ORE User Guide - Resource Map Implementation in RDFa

Abstract

Open Archives Initiative Object Reuse and Exchange (OAI-ORE) defines standards for the description and exchange of aggregations of Web resources. OAI-ORE introduces the notion of a Resource Map, an RDF Graph [RDF Concepts] which describes the Aggregation, the Aggregated Resources of which it is composed, and the relationships between them (and/or the relationships between these and other resources). Since a Resource Map is an RDF Graph, it can be serialized using any RDF syntax. This document outlines the use of RDFa [RDFa Syntax] to serialize Resource Maps. A companion document [ORE RDFXML] outlines the serialization of Resource Maps using RDF/XML [RDFXML Syntax].

This document is intended for implementers who have an understanding of ORE concepts and are responsible for the development of applications which generate or process Resource Maps using RDFa. Readers who want a high-level understanding of the motivation for ORE, and of the solution it provides, should read the ORE Primer [Primer]; readers who want further details of the RDFa syntax should consult the W3C RDFa specification [RDFa Syntax].

This is one of several documents comprising the OAI-ORE specifications and user guides.

1. Introduction

Open Archives Initiative Object Reuse and Exchange (OAI-ORE) defines standards for the description and exchange of aggregations of Web resources. OAI-ORE introduces the notion of a Resource Map, an RDF Graph [RDF Concepts] which describes the Aggregation, the aggregated Resources of which it is composed, and the relationships between them (and/or the relationships between these and other resources. Since a Resource Map is an RDF Graph, it can be serialized using any RDF syntax. This document outlines the use RDFa [RDFa Syntax] to serialize Resource Maps.

The RDFa in XHTML specification [RDFa Syntax] describes how to encode an RDF Graph within an HTML or XHTML document using a set of attributes. RDFa makes use of existing HTML/XHTML markup and content so that the same data which is typically rendered to a human reader is used as the basis of the content of the RDF Graph and the need to repeat content is minimised.

1.1 Notational Conventions

The keywords "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [IETF RFC 2119].

This specification uses the common term URI to mean both IRI [RFC3987] and URI [RFC3986].

1.2 Namespaces

This specification uses the following namespaces and prefixes to indicate those namespaces:

Prefix	Namespace URI	Description
`dc`	`http://purl.org/dc/elements/1.1/`	Dublin Core elements
`dcterms`	`http://purl.org/dc/terms/`	Dublin Core terms
`foaf`	`http://xmlns.com/foaf/0.1/`	FOAF vocabulary terms
`ore`	`http://www.openarchives.org/ore/terms/`	ORE vocabulary terms
`xsd`	`http://www.w3.org/2001/XMLSchema#`	XML Schema Datatypes
`rdf`	`http://www.w3.org/1999/02/22-rdf-syntax-ns#`	RDF vocabulary terms
`rdfs`	`http://www.w3.org/2000/01/rdf-schema#`	RDFS vocabulary terms
`eptype`	`http://purl.org/eprint/type/`	Eprints type vocabulary
`repo`	`info:eu-repo/semantics/`	Driver object type vocabulary

1.3 Conformance

Where an XHTML document containing RDFa is used to serialize an ORE Resource Map, that XHTML+RDFa document MUST be a strictly conforming XHTML+RDFa document as described in the RDFa in XHTML specification [RDFa Syntax].

A consumer of ORE Resource Maps encoded in RDFa MUST support all of the syntactic conventions defined by RDFa.

2. Summary of Recommended RDFa Syntax

The RDFa syntax provides some flexibility in the way an RDF Graph is encoded. The aim of this section is not to provide a full description of the RDFa syntax, but rather to provide some recommendations on how the RDFa syntax can be used to encode an ORE Resource Map. It is not a requirement that this particular set of conventions is used. To encode an ORE Resource Map, a provider of ORE Resource Maps MAY use any of the syntactic conventions defined by RDFa.

Simplifying considerably, in RDFa:

the subject of a triple is encoded as the value of an about attribute (or when the rev attribute is used, the value of the href or resource attributes)
the predicate of a triple is encoded as the value of a name, property, rel or rev attribute
the object of a triple is encoded as the value of a content, href, src or resource attribute, or as XML element content (or when the rev attribute is used, of the about attribute)
the datatype of a typed literal object is encoded as the value of the datatype attribute
the typeof attribute is used to indicate a triple with an rdf:type predicate

The following example is an XHTML+RDFa document (adapted from [RDFa Primer]) constructed according to the rules above.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN"
                      "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:dc="http://purl.org/dc/elements/1.1/"
      xmlns:dcterms="http://purl.org/dc/terms/"
      xmlns:foaf="http://xmlns.com/foaf/0.1/"
      xmlns:cc="http://creativecommons.org/ns#"
      version="XHTML+RDFa 1.0"
      xml:lang="en">
  <head>
    <title>Alice's Weblog</title>
  </head>

  <body>
    <div>
      <p>All content on this site is licensed under a <a rel="cc:license" href="http://creativecommons.org/licenses/by/3.0/">Creative Commons License</a>.</p>

      <div class="blog-entry" about="/posts/trouble_with_bob">
        <h2 property="dc:title">The trouble with Bob</h2>

        The trouble with Bob is that he takes much better photos than I do:

        <div about="http://example.com/bob/photos/sunset.jpg">
          <img src="http://example.com/bob/photos/sunset.jpg" />
          <span property="dc:title">Beautiful Sunset</span>
          by <span rel="dcterms:creator">
               <span property="foaf:name">Bob</span>
           </span>.
        </div>
     </div>
    </div>
  </body>
</html>

XHTML+RDFa, RDF/XML via RDFa Distiller, NTriples via RDFa Distiller

The XHTML+RDFa document encodes the following RDF triples (assuming the URI of the document is http://example.org/blog/):

Subject	Predicate	Object
`<http://example.org/blog/>`	`cc:license`	`<http://creativecommons.org/licenses/by/3.0/>`
`<http://example.org/posts/trouble_with_bob>`	`dc:title`	`"The trouble with Bob"`
`<http://example.com/bob/photos/sunset.jpg>`	`dc:title`	`"Beautiful Sunset"`
`<http://example.com/bob/photos/sunset.jpg>`	`dcterms:creator`	`<_:bnode1>`
`<_:bnode1>`	`foaf:name`	`"Bob"`

The subject URI of the first triple is the URI of the document; for the three subsequent triples, the subject is determined from the value of the about attribute. The predicates are determined from the values of the rel attribute (in the first and third cases) and the property attribute in the other. The objects are determined from the value of the href attribute (in the first case) and the content of the element with the property attribute in the subsequent cases.

The last two triples illustrate the use of a "blank node" (or "bnode"). Blank nodes MAY occur in ORE Resource Maps when asserting the creator of or contributors to the Resource Map, the Aggregation, or Aggregated Resources. In the example shown, the creator of the photograph is "Bob", but Bob has no associated URI. Instead the special "_" (underscore) prefix (and an arbitrary local part with no global meaning, in this case bnode1) is used to identify the blank node in the fourth and fifth lines in the table of triples.

Note that this is not intended to be a full description of the RDFa processing rules; for that information, see RDFa in XHTML: Syntax and Processing [RDFa Syntax].

2.1 URIs in RDFa

In RDFa, an RDF URI reference is always encoded as the value of an XML attribute.

The attribute values may take the form of a URI in full or of a relative reference, to be resolved relative to a base URI, either a URI provided by the use of the XHTML base element, or the URI of the document itself.

Some of the attributes used in RDFa also support the encoding of a URI in an abbreviated form as a CURIE or "compact URI". The use of a CURIE allows the author to replace the leading section of a URI with a substitution token which is mapped to a URI. The full URI represented by a CURIE is obtained by concatenating the second part of the CURIE onto the URI to which the substitution token is mapped. The mapping of substitution token to URI is expressed using an XML Namespace declaration. This mechanism is quite similar to that used in RDF/XML to map URIs to XML QNames, with the important difference that the lexical constraints on CURIEs are less stringent than those on QNames, so that any URI can be abbreviated as a CURIE, whereas, as noted above, there are some URIs which can not be mapped to QNames.

The attributes used by RDFa vary in their support for these different ways of representing URIs:

about and resource support either a URI or a CURIE (expressed as a "safe CURIE" )
href and src support only a URI.
property, datatype and typeof support only lists of CURIEs as values.
rel and rev support lists of both XHTML link types and CURIEs.

The following three examples (extracted from the RDFa in XHTML Syntax and Processing document [RDFa Syntax]), illustrate three different ways of encoding the URI http://dbpedia.org/resource/Albert_Einstein as the value of the about attribute, in the first case as a URI represented in full, and in the latter two cases as a CURIE

  <div>
    <div about="http://dbpedia.org/resource/Albert_Einstein">

    </div>
  </div>

  <div xmlns:db="http://dbpedia.org/">
    <div about="[db:resource/Albert_Einstein]">

    </div>
  </div>

  <div xmlns:dbr="http://dbpedia.org/resource/">
    <div about="[dbr:Albert_Einstein]">

    </div>
  </div>

For a full description of the mechanism for mapping CURIEs to URIs, see the section "CURIE and URI Processing" in RDFa in XHTML: Syntax and Processing [RDFa Syntax].

2.2 Choice of URIs in the Splash Page Scenario

One application for RDFa is to encode a Resource Map within a human readable XHTML page describing an Aggregation. In repositories of scholarly documents and other applications, such pages are often referred to as Splash Pages. It is also possible that the Splash Page be included as one of the Aggregated Resources of the Aggregation.

Within the ORE Model, the URI of the Resource Map (URI-R) MUST be distinct from the URI of the Aggregation (URI-A). Similarly the URI of a Splash Page (URI-S) MUST be distinct from the URI of the Aggregation (URI-A).

It is RECOMMENDED that the URI of a Splash Page be distinct from the URI of the Resource Map if the Splash Page is itself an Aggregated Resource.

For further discussion of URI choice with RDFa serialization, see implementation with RDFa or microformats in [ORE HTTP].

3. Example of Resource Maps Encoded in RDFa

The remainder of this section uses the an e-print in arXiv with a "splash page" at http://arxiv.org/abs/astro-ph/0601007 to illustrate a possible XHTML-RDFa encoding of a Resource Map. This is an interesting example because it has multiple identifiers, versions, formats, mirrors and external relationships. For illustrative purposes, the example diverges from the real e-print in arXiv in the manner that it associates an aggregation of data with the e-print.

These examples use the following URIs for the Aggregation (URI-A) and Resource Map (URI-R). As specified, the URI-A of an Aggregation should be distinct from the URI of a splash page.

URI-A: http://arxiv.org/aggregation/astro-ph/0601007
URI-R: http://arxiv.org/rem/xhtml/astro-ph/0601007

The ordering of the following subsections correspond to that used to introduce features in the Abstract Data Model Specification [Abstract Data Model]. Each section header links to the corresponding Abstract Data Model section. The examples are not intended to be exhaustive, but sufficient to demonstrate the RDFa syntax.

3.1 Relationship between a Resource Map and an Aggregation

A Resource Map MUST include one triple with an ore:describes predicate. The subject of this triple MUST be the URI-R of the Resource Map. The object is the URI-A of the Aggregation described by the Resource Map.

The triples corresponding to the example are:

Subject	Predicate	Object
Assertions about Resource Map
http://arxiv.org/rem/xhtml/astro-ph/0601007	ore:describes	http://arxiv.org/aggregation/astro-ph/0601007
Assertions about Aggregation
http://arxiv.org/aggregation/astro-ph/0601007	ore:isDescribedy	http://arxiv.org/rem/atom/astro-ph/0601007
http://arxiv.org/aggregation/astro-ph/0601007	ore:isDescribedy	http://arxiv.org/rem/xhtml/astro-ph/0601007

These triples could be expressed in XHTML+RDFa as follows:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN"
                      "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:ore="http://www.openarchives.org/ore/terms/"
      version="XHTML+RDFa 1.0"
      xml:lang="en">
  <head>
    <title>Resource Map http://arxiv.org/rem/xhtml/astro-ph/0601007</title>
  </head>

  <body>
    <div about="http://arxiv.org/rem/xhtml/astro-ph/0601007"
        class="ResourceMap">
        <h1>Resource Map http://arxiv.org/rem/xhtml/astro-ph/0601007</h1>

      <p>Describes Aggregation: <a rel="ore:describes"
        href="http://arxiv.org/aggregation/astro-ph/0601007">
        http://arxiv.org/aggregation/astro-ph/0601007</a></p>

      <div about="http://arxiv.org/aggregation/astro-ph/0601007"
        class="Aggregation">
        <h2>Aggregation http://arxiv.org/aggregation/astro-ph/0601007</h2>

        <p>Is Described By Resource Map: <a rel="ore:isDescribedBy"
          href="http://arxiv.org/rem/atom/astro-ph/0601007">
          http://arxiv.org/rem/atom/astro-ph/0601007</a></p>

        <p>Is Described By Resource Map: <a rel="ore:isDescribedBy"
          href="http://arxiv.org/rem/rdf/astro-ph/0601007">
          http://arxiv.org/rem/rdf/astro-ph/0601007</a></p>

      </div>

    </div>

  </body>
</html>

XHTML+RDFa, RDF/XML via RDFa Distiller, NTriples via RDFa Distiller

Note: The use of bold in the XHTML+RDFa example above indicates the segment of the XML that corresponds to the triples in the table that immediately preceeds the example. This visual cue will be used throughout this document.

3.2 Metadata about the Resource Map and Aggregation

A Resource Map MUST include triples expressing minimal metadata properties about the Resource Map. It MAY include triples expressing additional metadata properties about the Resource Map. Finally it MAY include triples expressing metadata properties about the Aggregation.

The triples corresponding to the example are:

Subject	Predicate	Object
Assertions about Resource Map (and related Agents)
http://arxiv.org/rem/xhtml/astro-ph/0601007	dcterms:creator	_:blank1
_:blank1	foaf:name	"arXiv.org e-Print Repository"
_:blank1	foaf:page	http://arXiv.org
http://arxiv.org/rem/xhtml/astro-ph/0601007	dcterms:created	"2008-10-01T18:30:02Z"^^ http://www.w3.org/2001/XMLSchema#dateTime
http://arxiv.org/rem/xhtml/astro-ph/0601007	dcterms:modified	"2008-10-03T07:30:34Z"^^ http://www.w3.org/2001/XMLSchema#dateTime
http://arxiv.org/rem/xhtml/astro-ph/0601007	dc:rights	"This Resource Map is available under the Creative Commons Attribution-Noncommercial 2.5 Generic license"
http://arxiv.org/rem/xhtml/astro-ph/0601007	dcterms:rights	http://creativecommons.org/licenses/by-nc/2.5/
Assertions about Aggregation (and related Agents)
http://arxiv.org/aggregation/astro-ph/0601007	dc:title	"Parametrization of K-essence and Its Kinetic Term"
http://arxiv.org/aggregation/astro-ph/0601007	dcterms:abstract	"We construct the non-canonical kinetic term of a k-essence field directly from the effective equation of state function $w_k(z)$, which describes the properties of the dark energy. Adopting the usual parametrizations of equation of state we numerically reproduce the shape of the non-canonical kinetic term and discuss some features of the constructed form of k-essence."
http://arxiv.org/aggregation/astro-ph/0601007	dcterms:created	"2005-12-31T04:01:23Z"^^ http://www.w3.org/2001/XMLSchema#dateTime
http://arxiv.org/aggregation/astro-ph/0601007	dcterms:modified	"2006-01-18T06:16:15Z"^^ http://www.w3.org/2001/XMLSchema#dateTime
http://arxiv.org/aggregation/astro-ph/0601007	dcterms:creator	_:blank2
_:blank2	foaf:name	"Hui Li"
_:blank2	foaf:mbox	mailto:lihui@somewhere.cn
http://arxiv.org/aggregation/astro-ph/0601007	dcterms:creator	_:blank3
_:blank3	foaf:name	"Zong-Kuan Guo"
http://arxiv.org/aggregation/astro-ph/0601007	dcterms:creator	_:blank4
_:blank4	foaf:name	"Yuan-Zhong Zhang"

Note the introduction of bnodes for the creators of the Resource Map and of the Aggregation — where there are no available URI for the agents.

These triples could be expressed in XHTML+RDFa as follows:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN"
                      "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:ore="http://www.openarchives.org/ore/terms/"
      xmlns:dc="http://purl.org/dc/elements/1.1/"
      xmlns:dcterms="http://purl.org/dc/terms/"
      xmlns:foaf="http://xmlns.com/foaf/0.1/"
      xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
      xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
      xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
      version="XHTML+RDFa 1.0"
      xml:lang="en">
  <head>
    <title>Resource Map http://arxiv.org/rem/xhtml/astro-ph/0601007</title>
  </head>

  <body>
    <div about="http://arxiv.org/rem/xhtml/astro-ph/0601007"
      class="ResourceMap">
      <h1>Resource Map http://arxiv.org/rem/xhtml/astro-ph/0601007</h1>

      <p>Describes Aggregation: <a rel="ore:describes"
        href="http://arxiv.org/aggregation/astro-ph/0601007">
        http://arxiv.org/aggregation/astro-ph/0601007</a></p>

        <p>Creator:
          <span rel="dcterms:creator">
            <span property="foaf:name">arXiv.org e-Print Repository</span>
            <a rel="foaf:page" href="http://arXiv.org">http://arXiv.org</a>
          </span>
        </p>

      <p>Creation date: <span property="dcterms:created"
        datatype="xsd:dateTime" content="2008-10-01T18:30:02Z">2008-10-01T18:30:02Z</span></p>

      <p>Modification date: <span property="dcterms:modified"
        datatype="xsd:dateTime" content="2008-10-03T07:30:34Z">2008-10-03T07:30:34Z</span></p>

      <p>Rights:
        <span property="dc:rights">
          This Resource Map is available under the Creative Commons Attribution-Noncommercial 2.5 Generic license
        </span>
      </p>

      <p>Rights:
        <a rel="dcterms:rights" href="http://creativecommons.org/licenses/by-nc/2.5/">
          http://creativecommons.org/licenses/by-nc/2.5/
        </a>
      </p>

      <div about="http://arxiv.org/aggregation/astro-ph/0601007"
        class="Aggregation">
        <h2>Aggregation http://arxiv.org/aggregation/astro-ph/0601007</h2>

        <p>Is Described By Resource Map: <a rel="ore:isDescribedBy"
          href="http://arxiv.org/rem/atom/astro-ph/0601007">
          http://arxiv.org/rem/atom/astro-ph/0601007</a></p>

        <p>Is Described By Resource Map: <a rel="ore:isDescribedBy"
          href="http://arxiv.org/rem/rdf/astro-ph/0601007">
          http://arxiv.org/rem/rdf/astro-ph/0601007</a></p>

        <p>Title:
          <span property="dc:title">
            Parametrization of K-essence and Its Kinetic Term
          </span>
        </p>

        <p>Abstract:
          <span property="dcterms:abstract">
            We construct the non-canonical kinetic term of a k-essence field directly
            from the effective equation of state function $w_k(z)$, which describes the properties
            of the dark energy. Adopting the usual parametrizations of equation of state we
            numerically reproduce the shape of the non-canonical kinetic term and discuss some
            features of the constructed form of k-essence.
          </span>
        </p>

        <p>Creation date: <span property="dcterms:created"
          datatype="xsd:dateTime" content="2005-12-31T04:01:23Z">2005-12-31T04:01:23Z</span></p>

        <p>Modification date: <span property="dcterms:modified"
          datatype="xsd:dateTime" content="2006-01-18T06:16:15Z">2006-01-18T06:16:15Z</span></p>

        <p>Creator:
          <span rel="dcterms:creator">
            <span property="foaf:name">Hui Li</span>
            <a rel="foaf:mbox" href="mailto:lihui@somewhere.cn">mailto:lihui@somewhere.cn</a>
          </span>
        </p>

        <p>Creator:
          <span rel="dcterms:creator">
            <span property="foaf:name">Zong-Kuan Guo</span>
          </span>
        </p>

        <p>Creator:
          <span rel="dcterms:creator">
            <span property="foaf:name">Yuan-Zhong Zhang</span>
          </span>
        </p>

      </div>

    </div>

  </body>
</html>

XHTML+RDFa, RDF/XML via RDFa Distiller, NTriples via RDFa Distiller

3.3 Aggregated Resources and Aggregation Graph

A Resource Map MAY include one or more triples describing the relationship between the Aggregation and Aggregated Resources.

The triples corresponding to the example are:

Subject	Predicate	Object
Assertions about Aggregation
http://arxiv.org/aggregation/astro-ph/0601007	ore:aggregates	http://arxiv.org/abs/astro-ph/0601007
http://arxiv.org/aggregation/astro-ph/0601007	ore:aggregates	http://arxiv.org/pdf/astro-ph/0601007
http://arxiv.org/aggregation/astro-ph/0601007	ore:aggregates	http://arxiv.org/ps/astro-ph/0601007
http://arxiv.org/aggregation/astro-ph/0601007	ore:aggregates	http://arxiv.org/ps/astro-ph/0601007?dpi=600&font=bitmapped
http://arxiv.org/aggregation/astro-ph/0601007	ore:aggregates	http://arxiv.org/ps/astro-ph/0601007?dpi=300&font=bitmapped
http://arxiv.org/aggregation/astro-ph/0601007	ore:aggregates	http://arxiv.org/ps/astro-ph/0601007?fname=cm&font=TypeI
http://arxiv.org/aggregation/astro-ph/0601007	ore:aggregates	http://arxiv.org/dvi/astro-ph/0601007
http://arxiv.org/aggregation/astro-ph/0601007	ore:aggregates	http://export.arxiv.org/oai2?verb=GetRecord &metadataPrefix=oai_dc&identifier=oai:arXiv.org:astro-ph/0601007
http://arxiv.org/aggregation/astro-ph/0601007	ore:aggregates	http://arxiv.org/cits/astro-ph/0601007
http://arxiv.org/aggregation/astro-ph/0601007	ore:aggregates	http://www.citebase.org/abstract?id=oai:arXiv.org:astro-ph/0601007

These triples could be expressed in XHTML+RDFa as follows:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN"
                      "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:ore="http://www.openarchives.org/ore/terms/"
      xmlns:dc="http://purl.org/dc/elements/1.1/"
      xmlns:dcterms="http://purl.org/dc/terms/"
      xmlns:foaf="http://xmlns.com/foaf/0.1/"
      xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
      xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
      xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
      version="XHTML+RDFa 1.0"
      xml:lang="en">
  <head>
    <title>Resource Map http://arxiv.org/rem/xhtml/astro-ph/0601007</title>
  </head>

  <body>

...
        <p>Components/members of Aggregation: </p>
        <ul>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/abs/astro-ph/0601007">
            http://arxiv.org/abs/astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/pdf/astro-ph/0601007">
            http://arxiv.org/pdf/astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/ps/astro-ph/0601007">
            http://arxiv.org/ps/astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/ps/astro-ph/0601007?dpi=600&amp;font=bitmapped">
            http://arxiv.org/ps/astro-ph/0601007?dpi=600&amp;font=bitmapped</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/ps/astro-ph/0601007?dpi=300&amp;font=bitmapped">
            http://arxiv.org/ps/astro-ph/0601007?dpi=300&amp;font=bitmapped</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/ps/astro-ph/0601007?fname=cm&amp;font=TypeI">
            http://arxiv.org/ps/astro-ph/0601007?fname=cm&amp;font=TypeI</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/dvi/astro-ph/0601007">
            http://arxiv.org/dvi/astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://export.arxiv.org/oai2?verb=GetRecord
&amp;metadataPrefix=oai_dc&amp;identifier=oai:arXiv.org:astro-ph/0601007">
            http://export.arxiv.org/oai2?verb=GetRecord
&amp;metadataPrefix=oai_dc&amp;identifier=oai:arXiv.org:astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/cits/astro-ph/0601007">
            http://arxiv.org/cits/astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://www.citebase.org/abstract?id=oai:arXiv.org:astro-ph/0601007">
            http://www.citebase.org/abstract?id=oai:arXiv.org:astro-ph/0601007</a></li>
        </ul>

      </div>

    </div>

  </body>
</html>

XHTML+RDFa, RDF/XML via RDFa Distiller, NTriples via RDFa Distiller

3.4 Relationships between the Aggregation and Similar Resources

A Resource Map MAY include one or more triples, with URI-A as the subject, which assert that the Aggregation is a Resource with content that is similar to another Resource. The predicate MAY be either rdfs:seeAlso or its sub-property ore:similarTo.

The triples corresponding to the example are:

Subject	Predicate	Object
Assertions about Aggregation
http://arxiv.org/aggregation/astro-ph/0601007	rdfs:seeAlso	http://arxiv.org/abs/astro-ph/0601007
http://arxiv.org/aggregation/astro-ph/0601007	rdfs:seeAlso	http://jp.arxiv.org/aggregation/astro-ph/0601007
http://arxiv.org/aggregation/astro-ph/0601007	ore:similarTo	info:arxiv/astro-ph/0601007
http://arxiv.org/aggregation/astro-ph/0601007	ore:similarTo	info:doi/10.1142/S0217732306019475

These triples could be expressed in XHTML+RDFa as follows:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN"
                      "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:ore="http://www.openarchives.org/ore/terms/"
      xmlns:dc="http://purl.org/dc/elements/1.1/"
      xmlns:dcterms="http://purl.org/dc/terms/"
      xmlns:foaf="http://xmlns.com/foaf/0.1/"
      xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
      xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
      xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
      version="XHTML+RDFa 1.0"
      xml:lang="en">
  <head>
    <title>Resource Map http://arxiv.org/rem/xhtml/astro-ph/0601007</title>
  </head>

  <body>

...
        <p>See also:
          <a rel="rdfs:seeAlso"
            href="http://arxiv.org/abs/astro-ph/0601007">
            http://arxiv.org/abs/astro-ph/0601007</a>
        </p>
        <p>See also:
          <a rel="rdfs:seeAlso"
            href="http://jp.arxiv.org/aggregation/astro-ph/0601007">
            http://jp.arxiv.org/aggregation/astro-ph/0601007</a>
        </p>
        <p>Similar to:
          <a rel="ore:similarTo"
            href="info:arxiv/astro-ph/0601007">
            info:arxiv/astro-ph/0601007</a>
        </p>
        <p>Similar to:
          <a rel="ore:similarTo"
            href="info:doi/10.1142/S0217732306019475">
            info:doi/10.1142/S0217732306019475</a>
        </p>

      </div>

    </div>

  </body>
</html>

XHTML+RDFa, RDF/XML via RDFa Distiller, NTriples via RDFa Distiller

3.5 Relationships to other Resources and Types

A Resource Map MAY include additional triples that assert properties about the Resource Map, Aggregation, Aggregated Resources, or other related Resources or Literals.

The triples corresponding to the example are:

Subject	Predicate	Object
Assertions about Aggregation
http://arxiv.org/aggregation/astro-ph/0601007	dcterms:hasVersion	http://arxiv.org/aggregation/astro-ph/0601007v1
http://arxiv.org/aggregation/astro-ph/0601007	dcterms:hasVersion	http://arxiv.org/aggregation/astro-ph/0601007v2
http://arxiv.org/aggregation/astro-ph/0601007	dcterms:isReferencedBy	http://arxiv.org/aggregation/0807.1020
http://arxiv.org/aggregation/astro-ph/0601007	dcterms:isReferencedBy	http://arxiv.org/aggregation/0806.4327
http://arxiv.org/aggregation/astro-ph/0601007	rdf:type	http://purl.og/eprint/type/JournalArticle
http://arxiv.org/aggregation/astro-ph/0601007	dcterms:audience	_:blank6
_:blank6	rdf:value	"OCLC audience level 1: research"
Assertions about other Resource Maps
http://arxiv.org/rem/atom/astro-ph/0601007	dc:format	"application/atom+xml"
http://arxiv.org/rem/rdf/astro-ph/0601007	dc:format	"application/rdf+xml"
Assertions about related Aggregations
http://arxiv.org/aggregation/0807.1020	dc:title	"How the Scalar Field of Unified Dark Matter Models Can Cluster"
http://arxiv.org/aggregation/0806.4327	dc:title	"Cosmological scalar fields that mimic the $\Lambda CDM$ cosmological model"
Assertions about Aggregated Resources (and related Agents)
http://arxiv.org/abs/astro-ph/0601007	dc:title	"[astro-ph/0601007] Parametrization of K-essence and Its Kinetic Term"
http://arxiv.org/abs/astro-ph/0601007	dc:format	"text/html"
http://arxiv.org/abs/astro-ph/0601007	dc:language	"en"
http://arxiv.org/abs/astro-ph/0601007	rdf:type	info:eu-repo/semantics/humanStartPage
http://arxiv.org/pdf/astro-ph/0601007	dc:title	"Parametrization of K-essence and Its Kinetic Term"
http://arxiv.org/pdf/astro-ph/0601007	dc:format	"application/pdf"
http://arxiv.org/pdf/astro-ph/0601007	dc:language	"en"
http://arxiv.org/pdf/astro-ph/0601007	dcterms:conformsTo	info:pronom/fmt/18
http://arxiv.org/ps/astro-ph/0601007	dc:title	"Parametrization of K-essence and Its Kinetic Term"
http://arxiv.org/ps/astro-ph/0601007	dc:format	"application/postscript"
http://arxiv.org/ps/astro-ph/0601007	dc:language	"en"
http://arxiv.org/ps/astro-ph/0601007	dcterms:hasFormat	http://arxiv.org/pdf/astro-ph/0601007
http://arxiv.org/ps/astro-ph/0601007	dcterms:hasFormat	http://arxiv.org/ps/astro-ph/0601007?dpi=600&font=bitmapped
http://arxiv.org/ps/astro-ph/0601007	dcterms:hasFormat	http://arxiv.org/ps/astro-ph/0601007?dpi=300&font=bitmapped
http://arxiv.org/ps/astro-ph/0601007	dcterms:hasFormat	http://arxiv.org/ps/astro-ph/0601007?fname=cm&font=TypeI
http://arxiv.org/ps/astro-ph/0601007	dcterms:hasFormat	http://arxiv.org/dvi/astro-ph/0601007
http://arxiv.org/ps/astro-ph/0601007?dpi=600&font=bitmapped	dc:title	"Parametrization of K-essence and Its Kinetic Term (600 DPI Bitmapped Fonts PostScript)"
http://arxiv.org/ps/astro-ph/0601007?dpi=600&font=bitmapped	dc:format	"application/postscript"
http://arxiv.org/ps/astro-ph/0601007?dpi=600&font=bitmapped	dc:language	"en"
http://arxiv.org/ps/astro-ph/0601007?dpi=300&font=bitmapped	dc:title	"Parametrization of K-essence and Its Kinetic Term (300 DPI Bitmapped Fonts PostScript)"
http://arxiv.org/ps/astro-ph/0601007?dpi=300&font=bitmapped	dc:format	"application/postscript"
http://arxiv.org/ps/astro-ph/0601007?dpi=300&font=bitmapped	dc:language	"en"
http://arxiv.org/ps/astro-ph/0601007?fname=cm&font=TypeI	dc:title	"Parametrization of K-essence and Its Kinetic Term (Type I Fonts PostScript)"
http://arxiv.org/ps/astro-ph/0601007?fname=cm&font=TypeI	dc:format	"application/postscript"
http://arxiv.org/ps/astro-ph/0601007?fname=cm&font=TypeI	dc:language	"en"
http://arxiv.org/dvi/astro-ph/0601007	dc:title	"Parametrization of K-essence and Its Kinetic Term"
http://arxiv.org/dvi/astro-ph/0601007	dc:format	"application/dvi"
http://arxiv.org/dvi/astro-ph/0601007	dc:language	"en"
http://export.arxiv.org/oai2?verb=GetRecord &metadataPrefix=oai_dc&identifier=oai:arXiv.org:astro-ph/0601007	dc:title	"Dublin Core Metadata for Parametrization of K-essence and Its Kinetic Term"
http://export.arxiv.org/oai2?verb=GetRecord &metadataPrefix=oai_dc&identifier=oai:arXiv.org:astro-ph/0601007	dc:format	"application/xml"
http://export.arxiv.org/oai2?verb=GetRecord &metadataPrefix=oai_dc&identifier=oai:arXiv.org:astro-ph/0601007	dcterms:conformsTo	http://www.openarchives.org/OAI/2.0/oai_dc/
http://export.arxiv.org/oai2?verb=GetRecord &metadataPrefix=oai_dc&identifier=oai:arXiv.org:astro-ph/0601007	rdf:type	info:eu-repo/semantics/descriptiveMetadata
http://arxiv.org/cits/astro-ph/0601007	dc:title	"Citations for astro-ph/0601007"
http://arxiv.org/cits/astro-ph/0601007	dc:format	"text/html"
http://arxiv.org/cits/astro-ph/0601007	dc:language	"en"
http://www.citebase.org/abstract?id=oai:arXiv.org:astro-ph/0601007	dc:title	"Citebase - Parametrization of K-essence and Its Kinetic Term"
http://www.citebase.org/abstract?id=oai:arXiv.org:astro-ph/0601007	dc:format	"text/html"
http://www.citebase.org/abstract?id=oai:arXiv.org:astro-ph/0601007	dc:language	"en"
http://www.citebase.org/abstract?id=oai:arXiv.org:astro-ph/0601007	dcterms:creator	_:blank5
_:blank5	foaf:name	"The Citebase Project"
_:blank5	foaf:page	http://www.citebase.org/
_:blank5	foaf:mbox	mailto:tdb01r@ecs.soton.ac.uk

These triples could be expressed in XHTML+RDFa as follows:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN"
                      "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:ore="http://www.openarchives.org/ore/terms/"
      xmlns:dc="http://purl.org/dc/elements/1.1/"
      xmlns:dcterms="http://purl.org/dc/terms/"
      xmlns:foaf="http://xmlns.com/foaf0/0.1/"
      xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
      xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
      xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
      xmlns:eptype="http://purl.org/eprint/type/"
      xmlns:repo="info:eu-repo/semantics/"
      version="XHTML+RDFa 1.0"
      xml:lang="en">
  <head>
    <title>Resource Map http://arxiv.org/rem/xhtml/astro-ph/0601007</title>
  </head>

  <body>
    <div about="http://arxiv.org/rem/xhtml/astro-ph/0601007"
      class="ResourceMap">
      <h1>Resource Map http://arxiv.org/rem/xhtml/astro-ph/0601007</h1>

      <p>Describes Aggregation: <a rel="ore:describes"
        href="http://arxiv.org/aggregation/astro-ph/0601007">
        http://arxiv.org/aggregation/astro-ph/0601007</a></p>

        <p>Creator:
          <span rel="dcterms:creator">
            <span property="foaf:name">arXiv.org e-Print Repository</span>
            <a rel="foaf:page" href="http://arXiv.org">http://arXiv.org</a>
          </span>
        </p>

      <p>Creation date: <span property="dcterms:created"
        datatype="xsd:dateTime" content="2008-10-01T18:30:02Z">2008-10-01T18:30:02Z</span></p>

      <p>Modification date: <span property="dcterms:modified"
        datatype="xsd:dateTime" content="2008-10-03T07:30:34Z">2008-10-03T07:30:34Z</span></p>

      <p>Rights:
        <span property="dc:rights">
          This Resource Map is available under the Creative Commons Attribution-Noncommercial 2.5 Generic license
        </span>
      </p>

      <p>Rights:
        <a rel="dcterms:rights" href="http://creativecommons.org/licenses/by-nc/2.5/">
          http://creativecommons.org/licenses/by-nc/2.5/
        </a>
      </p>

      <div about="http://arxiv.org/aggregation/astro-ph/0601007"
        class="Aggregation" typeof="eptype:JournalArticle">
        <h2>Aggregation http://arxiv.org/aggregation/astro-ph/0601007</h2>

        <p>Is Described By Resource Map:
          <a rel="ore:isDescribedBy"
            href="http://arxiv.org/rem/atom/astro-ph/0601007">
            http://arxiv.org/rem/atom/astro-ph/0601007
            (<span property="dc:format">application/atom+xml</span>)
          </a>
        </p>

        <p>Is Described By Resource Map:
          <a rel="ore:isDescribedBy"
            href="http://arxiv.org/rem/rdf/astro-ph/0601007">
            http://arxiv.org/rem/rdf/astro-ph/0601007
            (<span property="dc:format">application/rdf+xml</span>)
          </a>
        </p>

        <p>Title:
          <span property="dc:title">
            Parametrization of K-essence and Its Kinetic Term
          </span>
        </p>

        <p>Abstract:
          <span property="dcterms:abstract">
            We construct the non-canonical kinetic term of a k-essence field directly
            from the effective equation of state function $w_k(z)$, which describes the properties
            of the dark energy. Adopting the usual parametrizations of equation of state we
            numerically reproduce the shape of the non-canonical kinetic term and discuss some
            features of the constructed form of k-essence.
          </span>
        </p>

        <p>Creation date: <span property="dcterms:created"
          datatype="xsd:dateTime" content="2005-12-31T04:01:23Z">2005-12-31T04:01:23Z</span></p>

        <p>Modification date: <span property="dcterms:modified"
          datatype="xsd:dateTime" content="2006-01-18T06:16:15Z">2006-01-18T06:16:15Z</span></p>

        <p>Creator:
          <span rel="dcterms:creator">
            <span property="foaf:name">Hui Li</span>
            <a rel="foaf:mbox" href="mailto:lihui@somewhere.cn">mailto:lihui@somewhere.cn</a>
          </span>.
        </p>

        <p>Creator:
          <span rel="dcterms:creator">
            <span property="foaf:name">Zong-Kuan Guo</span>
          </span>.
        </p>

        <p>Creator:
          <span rel="dcterms:creator">
            <span property="foaf:name">Yuan-Zhong Zhang</span>
          </span>.
        </p>

        <p>Components/members of Aggregation: </p>
        <ul>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/abs/astro-ph/0601007">
            http://arxiv.org/abs/astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/pdf/astro-ph/0601007">
            http://arxiv.org/pdf/astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/ps/astro-ph/0601007">
            http://arxiv.org/ps/astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/ps/astro-ph/0601007?dpi=600&amp;font=bitmapped">
            http://arxiv.org/ps/astro-ph/0601007?dpi=600&amp;font=bitmapped</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/ps/astro-ph/0601007?dpi=300&amp;font=bitmapped">
            http://arxiv.org/ps/astro-ph/0601007?dpi=300&amp;font=bitmapped</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/ps/astro-ph/0601007?fname=cm&amp;font=TypeI">
            http://arxiv.org/ps/astro-ph/0601007?fname=cm&amp;font=TypeI</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/dvi/astro-ph/0601007">
            http://arxiv.org/dvi/astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://export.arxiv.org/oai2?verb=GetRecord
&amp;metadataPrefix=oai_dc&amp;identifier=oai:arXiv.org:astro-ph/0601007">
            http://export.arxiv.org/oai2?verb=GetRecord
&amp;metadataPrefix=oai_dc&amp;identifier=oai:arXiv.org:astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/cits/astro-ph/0601007">
            http://arxiv.org/cits/astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://www.citebase.org/abstract?id=oai:arXiv.org:astro-ph/0601007">
            http://www.citebase.org/abstract?id=oai:arXiv.org:astro-ph/0601007</a></li>
        </ul>

        <p>See also:
          <a rel="rdfs:seeAlso"
            href="http://arxiv.org/abs/astro-ph/0601007">
            http://arxiv.org/abs/astro-ph/0601007</a>
        </p>
        <p>See also:
          <a rel="rdfs:seeAlso"
            href="http://jp.arxiv.org/aggregation/astro-ph/0601007">
            http://jp.arxiv.org/aggregation/astro-ph/0601007</a>
        </p>
        <p>Similar to:
          <a rel="ore:similarTo"
            href="info:arxiv/astro-ph/0601007">
            info:arxiv/astro-ph/0601007</a>
        </p>
        <p>Similar to:
          <a rel="ore:similarTo"
            href="info:doi/10.1142/S0217732306019475">
            info:doi/10.1142/S0217732306019475</a>
        </p>

        <p>Has version:
          <a rel="dcterms:hasVersion"
            href="http://arxiv.org/aggregation/astro-ph/0601007v1">
            http://arxiv.org/aggregation/astro-ph/0601007v1</a>
        </p>
        <p>Has version:
          <a rel="dcterms:hasVersion"
            href="http://arxiv.org/aggregation/astro-ph/0601007v2">
            http://arxiv.org/aggregation/astro-ph/0601007v2</a>
        </p>
        <p>Is Referenced By:
          <a rel="dcterms:isReferencedBy"
            href="http://arxiv.org/aggregation/0807.1020">
            http://arxiv.org/aggregation/0807.1020
            (Title: <span property="dc:title">How the Scalar Field of Unified Dark Matter Models Can Cluster</span>)
          </a>
        </p>
        <p>Is Referenced By:
          <a rel="dcterms:isReferencedBy"
            href="http://arxiv.org/aggregation/0806.4327">
            http://arxiv.org/aggregation/0806.4327
            (Title: <span property="dc:title">Cosmological scalar fields that mimic the $\Lambda CDM$ cosmological model</span>)
          </a>
        </p>

        <p>Audience:
          <span rel="dcterms:audience">
            <span property="rdf:value">OCLC audience level 1: research</span>
          </span>.
        </p>

        <div about="http://arxiv.org/abs/astro-ph/0601007"
          class="AggregatedResource" typeof="repo:humanStartPage">
          <h3>Aggregated Resource http://arxiv.org/abs/astro-ph/0601007</h3>

          <p>Title: <span property="dc:title">[astro-ph/0601007] Parametrization of K-essence and Its Kinetic Term</span></p>
          <p>Format: <span property="dc:format">text/html</span></p>
          <p>Language: <span property="dc:language">en</span></p>

        </div>

        <div about="http://arxiv.org/pdf/astro-ph/0601007"
          class="AggregatedResource">
          <h3>Aggregated Resource http://arxiv.org/pdf/astro-ph/0601007</h3>

          <p>Title: <span property="dc:title">Parametrization of K-essence and Its Kinetic Term</span></p>
          <p>Format: <span property="dc:format">application/pdf</span></p>
          <p>Language: <span property="dc:language">en</span></p>
          <p>Conforms to:
            <a rel="dcterms:conformsTo" href="info:pronom/fmt/18">info:pronom/fmt/18</a>
          </p>

        </div>

        <div about="http://arxiv.org/ps/astro-ph/0601007"
          class="AggregatedResource">
          <h3>Aggregated Resource http://arxiv.org/ps/astro-ph/0601007</h3>

          <p>Title: <span property="dc:title">Parametrization of K-essence and Its Kinetic Term</span></p>
          <p>Format: <span property="dc:format">application/postscript</span></p>
          <p>Language: <span property="dc:language">en</span></p>
          <p>Has Format:
            <a rel="dcterms:hasFormat"
                href="http://arxiv.org/pdf/astro-ph/0601007">http://arxiv.org/pdf/astro-ph/0601007</a>
          </p>
          <p>Has Format:
            <a rel="dcterms:hasFormat"
                href="http://arxiv.org/ps/astro-ph/0601007?dpi=600&amp;font=bitmapped">http://arxiv.org/ps/astro-ph/0601007?dpi=600&amp;font=bitmapped</a>
          </p>
          <p>Has Format:
            <a rel="dcterms:hasFormat"
                href="http://arxiv.org/ps/astro-ph/0601007?dpi=300&amp;font=bitmapped">http://arxiv.org/ps/astro-ph/0601007?dpi=300&amp;font=bitmapped</a>
          </p>
          <p>Has Format:
            <a rel="dcterms:hasFormat"
                href="http://arxiv.org/ps/astro-ph/0601007?fname=cm&amp;font=TypeI">http://arxiv.org/ps/astro-ph/0601007?fname=cm&amp;font=TypeI</a>
          </p>
          <p>Has Format:
            <a rel="dcterms:hasFormat"
                href="http://arxiv.org/dvi/astro-ph/0601007">http://arxiv.org/dvi/astro-ph/0601007</a>
          </p>

        </div>

        <div about="http://arxiv.org/ps/astro-ph/0601007?dpi=600&amp;font=bitmapped"
          class="AggregatedResource">
          <h3>Aggregated Resource http://arxiv.org/ps/astro-ph/0601007?dpi=600&amp;font=bitmapped</h3>

          <p>Title: <span property="dc:title">Parametrization of K-essence and Its Kinetic Term (600 DPI Bitmapped Fonts PostScript)</span></p>
          <p>Format: <span property="dc:format">application/postscript</span></p>
          <p>Language: <span property="dc:language">en</span></p>

        </div>

        <div about="http://arxiv.org/ps/astro-ph/0601007?dpi=300&amp;font=bitmapped"
          class="AggregatedResource">
          <h3>Aggregated Resource http://arxiv.org/ps/astro-ph/0601007?dpi=300&amp;font=bitmapped</h3>

          <p>Title: <span property="dc:title">Parametrization of K-essence and Its Kinetic Term (300 DPI Bitmapped Fonts PostScript)</span></p>
          <p>Format: <span property="dc:format">application/postscript</span></p>
          <p>Language: <span property="dc:language">en</span></p>

        </div>

        <div about="http://arxiv.org/ps/astro-ph/0601007?fname=cm&amp;font=TypeI"
          class="AggregatedResource">
          <h3>Aggregated Resource http://arxiv.org/ps/astro-ph/0601007?fname=cm&amp;font=TypeI</h3>

          <p>Title: <span property="dc:title">Parametrization of K-essence and Its Kinetic Term (Type I Fonts PostScript)</span></p>
          <p>Format: <span property="dc:format">application/postscript</span></p>
          <p>Language: <span property="dc:language">en</span></p>

        </div>

        <div about="http://arxiv.org/dvi/astro-ph/0601007"
          class="AggregatedResource">
          <h3>Aggregated Resource http://arxiv.org/dvi/astro-ph/0601007</h3>

          <p>Title: <span property="dc:title">Parametrization of K-essence and Its Kinetic Term</span></p>
          <p>Format: <span property="dc:format">application/dvi</span></p>
          <p>Language: <span property="dc:language">en</span></p>

        </div>

        <div about="http://export.arxiv.org/oai2?verb=GetRecord
&amp;metadataPrefix=oai_dc&amp;identifier=oai:arXiv.org:astro-ph/0601007"
          class="AggregatedResource" typeof="repo:descriptiveMetadata">
          <h3>Aggregated Resource http://export.arxiv.org/oai2?verb=GetRecord
&amp;metadataPrefix=oai_dc&amp;identifier=oai:arXiv.org:astro-ph/0601007</h3>

          <p>Title: <span property="dc:title">Dublin Core Metadata for Parametrization of K-essence and Its Kinetic Term</span></p>
          <p>Format: <span property="dc:format">application/xml</span></p>
          <p>Conforms to:
            <a rel="dcterms:conformsTo" href="http://www.openarchives.org/OAI/2.0/oai_dc/">http://www.openarchives.org/OAI/2.0/oai_dc/</a>
          </p>

        </div>

        <div about="http://arxiv.org/cits/astro-ph/0601007"
          class="AggregatedResource">
          <h3>Aggregated Resource http://arxiv.org/cits/astro-ph/0601007</h3>

          <p>Title: <span property="dc:title">Citations for astro-ph/0601007</span></p>
          <p>Format: <span property="dc:format">text/html</span></p>
          <p>Language: <span property="dc:language">en</span></p>

        </div>

        <div about="http://www.citebase.org/abstract?id=oai:arXiv.org:astro-ph/0601007"
          class="AggregatedResource">
          <h3>Aggregated Resource http://www.citebase.org/abstract?id=oai:arXiv.org:astro-ph/0601007</h3>

          <p>Title: <span property="dc:title">Citebase - Parametrization of K-essence and Its Kinetic Term</span></p>
          <p>Format: <span property="dc:format">text/html</span></p>
          <p>Language: <span property="dc:language">en</span></p>

          <p>Creator:
            <span rel="dcterms:creator">
              <span property="foaf:name">The Citebase Project</span>
              <a rel="foaf:mbox" href="mailto:tdb01r@ecs.soton.ac.uk">mailto:tdb01r@ecs.soton.ac.uk</a>
              <a rel="foaf:page" href="http://www.citebase.org/">http://www.citebase.org/</a>
            </span>.
          </p>

        </div>

      </div>

    </div>

  </body>
</html>

XHTML+RDFa, RDF/XML via RDFa Distiller, NTriples via RDFa Distiller

3.6 Asserting that an Aggregated Resource is a constituent of another Aggregation

A Resource Map MAY include one or more triples with the ore:isAggregatedBy predicate to assert that an Aggregated Resource is a constituent of other Aggregations.

The triple corresponding to the example is:

Subject	Predicate	Object
Assertions about Aggregated Resource
http://arxiv.org/ps/astro-ph/0601007	ore:isAggregatedBy	http://example.org/aggregation-1

These triples could be expressed in XHTML+RDFa as follows:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN"
                      "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:ore="http://www.openarchives.org/ore/terms/"
      xmlns:dc="http://purl.org/dc/elements/1.1/"
      xmlns:dcterms="http://purl.org/dc/terms/"
      xmlns:foaf="http://xmlns.com/foaf/0.1/"
      xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
      xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
      xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
      xmlns:eptype="http://purl.org/eprint/type/"
      xmlns:repo="info:eu-repo/semantics/"
      version="XHTML+RDFa 1.0"
      xml:lang="en">

...
        <div about="http://arxiv.org/ps/astro-ph/0601007"
          class="AggregatedResource">
          <h3>Aggregated Resource http://arxiv.org/ps/astro-ph/0601007</h3>

          <p>Title: <span property="dc:title">Parametrization of K-essence and Its Kinetic Term</span></p>
          <p>Format: <span property="dc:format">application/postscript</span></p>
          <p>Language: <span property="dc:language">en</span></p>
          <p>Has Format:
            <a rel="dcterms:hasFormat"
                href="http://arxiv.org/pdf/astro-ph/0601007">http://arxiv.org/pdf/astro-ph/0601007</a>
          </p>
          <p>Has Format:
            <a rel="dcterms:hasFormat"
                href="http://arxiv.org/ps/astro-ph/0601007?dpi=600&amp;font=bitmapped">http://arxiv.org/ps/astro-ph/0601007?dpi=600&amp;font=bitmapped</a>
          </p>
          <p>Has Format:
            <a rel="dcterms:hasFormat"
                href="http://arxiv.org/ps/astro-ph/0601007?dpi=300&amp;font=bitmapped">http://arxiv.org/ps/astro-ph/0601007?dpi=300&amp;font=bitmapped</a>
          </p>
          <p>Has Format:
            <a rel="dcterms:hasFormat"
                href="http://arxiv.org/ps/astro-ph/0601007?fname=cm&amp;font=TypeI">http://arxiv.org/ps/astro-ph/0601007?fname=cm&amp;font=TypeI</a>
          </p>
          <p>Has Format:
            <a rel="dcterms:hasFormat"
                href="http://arxiv.org/dvi/astro-ph/0601007">http://arxiv.org/dvi/astro-ph/0601007</a>
          </p>
          <p>Is Aggregated By:
            <a rel="ore:isAggregatedy"
                href="http://example.org/aggregation-1">http://example.org/aggregation-1</a></p>

        </div>
  ...
</html>

XHTML+RDFa, RDF/XML via RDFa Distiller, NTriples via RDFa Distiller

3.7 Nesting Aggregations

A Resource Map that asserts another Aggregation as an Aggregated Resource MAY assert an ore:isDescribedBy relationship between this Aggregated Resource and a Resource Map describing the other Aggregation.

The triples corresponding to the example are:

Subject	Predicate	Object
Assertions about Aggregation
http://arxiv.org/aggregation/astro-ph/0601007	ore:aggregates	http://example.org/dataSet
Assertions about Aggregated Resource
http://example.org/dataSet	ore:isDescribedBy	http://example.org/dataSet/rem.rdf

These triples could be expressed in XHTML+RDFa as follows:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN"
                      "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:ore="http://www.openarchives.org/ore/terms/"
      xmlns:dc="http://purl.org/dc/elements/1.1/"
      xmlns:dcterms="http://purl.org/dc/terms/"
      xmlns:foaf="http://xmlns.com/foaf/0.1/"
      xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
      xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
      xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
      xmlns:eptype="http://purl.org/eprint/type/"
      xmlns:repo="info:eu-repo/semantics/"
      version="XHTML+RDFa 1.0"
      xml:lang="en">
  <head>
    <title>Resource Map http://arxiv.org/rem/xhtml/astro-ph/0601007</title>
  </head>

  <body>

...
        <p>Components/members of Aggregation: </p>
        <ul>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/abs/astro-ph/0601007">
            http://arxiv.org/abs/astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/pdf/astro-ph/0601007">
            http://arxiv.org/pdf/astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/ps/astro-ph/0601007">
            http://arxiv.org/ps/astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/ps/astro-ph/0601007?dpi=600&amp;font=bitmapped">
            http://arxiv.org/ps/astro-ph/0601007?dpi=600&amp;font=bitmapped</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/ps/astro-ph/0601007?dpi=300&amp;font=bitmapped">
            http://arxiv.org/ps/astro-ph/0601007?dpi=300&amp;font=bitmapped</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/ps/astro-ph/0601007?fname=cm&amp;font=TypeI">
            http://arxiv.org/ps/astro-ph/0601007?fname=cm&amp;font=TypeI</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/dvi/astro-ph/0601007">
            http://arxiv.org/dvi/astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://export.arxiv.org/oai2?verb=GetRecord
&amp;metadataPrefix=oai_dc&amp;identifier=oai:arXiv.org:astro-ph/0601007">
            http://export.arxiv.org/oai2?verb=GetRecord
&amp;metadataPrefix=oai_dc&amp;identifier=oai:arXiv.org:astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://arxiv.org/cits/astro-ph/0601007">
            http://arxiv.org/cits/astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://www.citebase.org/abstract?id=oai:arXiv.org:astro-ph/0601007">
            http://www.citebase.org/abstract?id=oai:arXiv.org:astro-ph/0601007</a></li>
          <li><a rel="ore:aggregates"
            href="http://example.org/dataSet">
            http://example.org/dataSet</a></li>
        </ul>

...
        <div about="http://arxiv.org/ps/astro-ph/0601007"
          class="AggregatedResource">
          <h3>Aggregated Resource http://arxiv.org/ps/astro-ph/0601007</h3>

          <p>Title: <span property="dc:title">Parametrization of K-essence and Its Kinetic Term</span></p>
          <p>Format: <span property="dc:format">application/postscript</span></p>
          <p>Language: <span property="dc:language">en</span></p>
          <p>Has Format:
            <a rel="dcterms:hasFormat"
                href="http://arxiv.org/pdf/astro-ph/0601007">http://arxiv.org/pdf/astro-ph/0601007</a>
          </p>
          <p>Has Format:
            <a rel="dcterms:hasFormat"
                href="http://arxiv.org/ps/astro-ph/0601007?dpi=600&amp;font=bitmapped">http://arxiv.org/ps/astro-ph/0601007?dpi=600&amp;font=bitmapped</a>
          </p>
          <p>Has Format:
            <a rel="dcterms:hasFormat"
                href="http://arxiv.org/ps/astro-ph/0601007?dpi=300&amp;font=bitmapped">http://arxiv.org/ps/astro-ph/0601007?dpi=300&amp;font=bitmapped</a>
          </p>
          <p>Has Format:
            <a rel="dcterms:hasFormat"
                href="http://arxiv.org/ps/astro-ph/0601007?fname=cm&amp;font=TypeI">http://arxiv.org/ps/astro-ph/0601007?fname=cm&amp;font=TypeI</a>
          </p>
          <p>Has Format:
            <a rel="dcterms:hasFormat"
                href="http://arxiv.org/dvi/astro-ph/0601007">http://arxiv.org/dvi/astro-ph/0601007</a>
          </p>
          <p>Is Aggregated By:
            <a rel="ore:isAggregatedy"
                href="http://example.org/aggregation-1">http://example.org/aggregation-1</a></p>

        </div>

...
        <div about="http://example.org/dataSet"
          class="AggregatedResource">
          <h3>Aggregated Resource http://example.org/dataSet</h3>

          <p>Is Described By: <a rel="ore:isDescribedBy"
            href="http://example.org/dataSet/rem.rdf"
            >http://example.org/dataSet/rem.rdf</a></p>

        </div>

      </div>

    </div>

  </body>
</html>

XHTML+RDFa, RDF/XML via RDFa Distiller, NTriples via RDFa Distiller

3.8 Proxies for Aggregated Resources

A Proxy is a Resource that "stands for" an Aggregated Resource in a manner that is specific to one Aggregation. A Resource Map MAY assert one Proxy for any Aggregated Resource asserted by the Resource Map.

The triples corresponding to the example are:

These triples could be expressed in XHTML+RDFa as follows:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN"
                      "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:ore="http://www.openarchives.org/ore/terms/"
      xmlns:dc="http://purl.org/dc/elements/1.1/"
      xmlns:dcterms="http://purl.org/dc/terms/"
      xmlns:foaf="http://xmlns.com/foaf/0.1/"
      xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
      xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
      xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
      xmlns:eptype="http://purl.org/eprint/type/"
      xmlns:repo="info:eu-repo/semantics/"
      version="XHTML+RDFa 1.0"
      xml:lang="en">
  <head>
    <title>Resource Map http://arxiv.org/rem/xhtml/astro-ph/0601007</title>
  </head>

  <body>

...
        <div about="http://oreproxy.org/r?what=http://arxiv.org/abs/astro-ph/0601007
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007"
          class="Proxy">
          <h3>Proxy http://oreproxy.org/r?what=http://arxiv.org/abs/astro-ph/0601007
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007</h3>
          <p>Is Proxy For: <a rel="ore:proxyFor"
            href="http://arxiv.org/abs/astro-ph/0601007"
            >http://arxiv.org/abs/astro-ph/0601007</a></p>
          <p>Is Proxy In: <a rel="ore:proxyIn"
            href="http://arxiv.org/aggregation/astro-ph/0601007"
            >http://arxiv.org/aggregation/astro-ph/0601007</a></p>
        </div>

        <div about="http://oreproxy.org/r?what=http://arxiv.org/pdf/astro-ph/0601007
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007"
          class="Proxy">
          <h3>Proxy http://oreproxy.org/r?what=http://arxiv.org/pdf/astro-ph/0601007
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007</h3>
          <p>Is Proxy For: <a rel="ore:proxyFor"
            href="http://arxiv.org/pdf/astro-ph/0601007"
            >http://arxiv.org/pdf/astro-ph/0601007</a></p>
          <p>Is Proxy In: <a rel="ore:proxyIn"
            href="http://arxiv.org/aggregation/astro-ph/0601007"
            >http://arxiv.org/aggregation/astro-ph/0601007</a></p>
        </div>

        <div about="http://oreproxy.org/r?what=http://arxiv.org/ps/astro-ph/0601007
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007"
          class="Proxy">
          <h3>Proxy http://oreproxy.org/r?what=http://arxiv.org/ps/astro-ph/0601007
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007</h3>
          <p>Is Proxy For: <a rel="ore:proxyFor"
            href="http://arxiv.org/ps/astro-ph/0601007"
            >http://arxiv.org/ps/astro-ph/0601007</a></p>
          <p>Is Proxy In: <a rel="ore:proxyIn"
            href="http://arxiv.org/aggregation/astro-ph/0601007"
            >http://arxiv.org/aggregation/astro-ph/0601007</a></p>
        </div>

        <div about="http://oreproxy.org/r?what=http://arxiv.org/ps/astro-ph/0601007?dpi%3d600%26font%3dbitmapped
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007"
          class="Proxy">
          <h3>Proxy http://oreproxy.org/r?what=http://arxiv.org/ps/astro-ph/0601007?dpi%3d600%26font%3dbitmapped
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007</h3>
          <p>Is Proxy For: <a rel="ore:proxyFor"
            href="http://arxiv.org/ps/astro-ph/0601007?dpi=600&amp;font=bitmapped"
            >http://arxiv.org/ps/astro-ph/0601007?dpi=600&amp;font=bitmapped</a></p>
          <p>Is Proxy In: <a rel="ore:proxyIn"
            href="http://arxiv.org/aggregation/astro-ph/0601007"
            >http://arxiv.org/aggregation/astro-ph/0601007</a></p>
        </div>

        <div about="http://oreproxy.org/r?what=http://arxiv.org/ps/astro-ph/0601007?dpi%3d300%26font%3dbitmapped
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007"
          class="Proxy">
          <h3>Proxy http://oreproxy.org/r?what=http://arxiv.org/ps/astro-ph/0601007?dpi%3d300%26font%3dbitmapped
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007</h3>
          <p>Is Proxy For: <a rel="ore:proxyFor"
            href="http://arxiv.org/ps/astro-ph/0601007?dpi=300&amp;font=bitmapped"
            >http://arxiv.org/ps/astro-ph/0601007?dpi=300&amp;font=bitmapped</a></p>
          <p>Is Proxy In: <a rel="ore:proxyIn"
            href="http://arxiv.org/aggregation/astro-ph/0601007"
            >http://arxiv.org/aggregation/astro-ph/0601007</a></p>
        </div>

        <div about="http://oreproxy.org/r?what=http://arxiv.org/ps/astro-ph/0601007?fname%3dcm%26font%3dTypeI
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007"
          class="Proxy">
          <h3>Proxy http://oreproxy.org/r?what=http://arxiv.org/ps/astro-ph/0601007?fname%3dcm%26font%3dTypeI
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007</h3>
          <p>Is Proxy For: <a rel="ore:proxyFor"
            href="http://arxiv.org/ps/astro-ph/0601007?fname=cm&amp;font=TypeI"
            >http://arxiv.org/ps/astro-ph/0601007?fname=cm&amp;font=TypeI</a></p>
          <p>Is Proxy In: <a rel="ore:proxyIn"
            href="http://arxiv.org/aggregation/astro-ph/0601007"
            >http://arxiv.org/aggregation/astro-ph/0601007</a></p>
        </div>

        <div about="http://oreproxy.org/r?what=http://arxiv.org/dvi/astro-ph/0601007
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007"
          class="Proxy">
          <h3>Proxy http://oreproxy.org/r?what=http://arxiv.org/dvi/astro-ph/0601007
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007</h3>
          <p>Is Proxy For: <a rel="ore:proxyFor"
            href="http://arxiv.org/dvi/astro-ph/0601007"
            >http://arxiv.org/dvi/astro-ph/0601007</a></p>
          <p>Is Proxy In: <a rel="ore:proxyIn"
            href="http://arxiv.org/aggregation/astro-ph/0601007"
            >http://arxiv.org/aggregation/astro-ph/0601007</a></p>
        </div>

        <div about="http://oreproxy.org/r?what=http://export.arxiv.org/oai2?verb%3dGetRecord
%26metadataPrefix%3doai_dc%26identifier%3doai:arXiv.org:astro-ph/0601007
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007"
          class="Proxy">
          <h3>Proxy http://oreproxy.org/r?what=http://export.arxiv.org/oai2?verb%3dGetRecord
%26metadataPrefix%3doai_dc%26identifier%3doai:arXiv.org:astro-ph/0601007
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007</h3>
          <p>Is Proxy For: <a rel="ore:proxyFor"
            href="http://export.arxiv.org/oai2?verb=GetRecord
&amp;metadataPrefix=oai_dc&amp;identifier=oai:arXiv.org:astro-ph/0601007"
            >http://export.arxiv.org/oai2?verb=GetRecord
&amp;metadataPrefix=oai_dc&amp;identifier=oai:arXiv.org:astro-ph/0601007</a></p>
          <p>Is Proxy In: <a rel="ore:proxyIn"
            href="http://arxiv.org/aggregation/astro-ph/0601007"
            >http://arxiv.org/aggregation/astro-ph/0601007</a></p>
        </div>

        <div about="http://oreproxy.org/r?what=http://arxiv.org/cits/astro-ph/0601007
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007"
          class="Proxy">
          <h3>Proxy http://oreproxy.org/r?what=http://arxiv.org/cits/astro-ph/0601007
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007</h3>
          <p>Is Proxy For: <a rel="ore:proxyFor"
            href="http://arxiv.org/cits/astro-ph/0601007"
            >http://arxiv.org/cits/astro-ph/0601007</a></p>
          <p>Is Proxy In: <a rel="ore:proxyIn"
            href="http://arxiv.org/aggregation/astro-ph/0601007"
            >http://arxiv.org/aggregation/astro-ph/0601007</a></p>
        </div>

        <div about="http://oreproxy.org/r?what=http://www.citebase.org/abstract?id%3doai:arXiv.org:astro-ph/0601007
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007"
          class="Proxy">
          <h3>Proxy http://oreproxy.org/r?what=http://www.citebase.org/abstract?id%3doai:arXiv.org:astro-ph/0601007
&amp;where=http://arxiv.org/aggregation/astro-ph/0601007</h3>
          <p>Is Proxy For: <a rel="ore:proxyFor"
            href="http://www.citebase.org/abstract?id=oai:arXiv.org:astro-ph/0601007"
            >http://www.citebase.org/abstract?id=oai:arXiv.org:astro-ph/0601007</a></p>
          <p>Is Proxy In: <a rel="ore:proxyIn"
            href="http://arxiv.org/aggregation/astro-ph/0601007"
            >http://arxiv.org/aggregation/astro-ph/0601007</a></p>
        </div>
      </div>

    </div>

  </body>
</html>

XHTML+RDFa, RDF/XML via RDFa Distiller, NTriples via RDFa Distiller

4. References

[ORE HTTP]: ORE User Guide - HTTP Implementation, C. Lagoze, H. Van de Sompel, P. Johnston, M. Nelson, R. Sanderson, S. Warner, 2008-10-17. Available at http://www.openarchives.org/ore/1.0/http .
[ORE Model]: ORE Specification - Abstract Data Model, C. Lagoze, H. Van de Sompel, P. Johnston, M. Nelson, R. Sanderson, S. Warner, 2008-10-17. Available at http://www.openarchives.org/ore/1.0/datamodel .
[ORE Primer]: ORE User Guide - Primer, C. Lagoze, H. Van de Sompel, P. Johnston, M. Nelson, R. Sanderson, S. Warner, 2008-10-17. Available at http://www.openarchives.org/ore/1.0/primer .
[ORE RDFXML]: ORE User Guide - Resource Map Implementation in RDF/XML, C. Lagoze, H. Van de Sompel, P. Johnston, M. Nelson, R. Sanderson, S. Warner, 2008-10-17. Available at http://www.openarchives.org/ore/1.0/rdfxml .
[RDF Concepts]: Resource Description Framework (RDF): Concepts and Abstract Syntax, Graham Klyne and Jeremy J. Carroll, Editors, W3C Recommendation, 10 February 2004, http://www.w3.org/TR/2004/REC-rdf-concepts-20040210/ . Latest version available at http://www.w3.org/TR/rdf-concepts/ .
[RDFa Primer]: RDFa Primer: Bridging the Human and Data Webs, Ben Adida, Mark Birbeck, Editors, W3C Working Draft 20 June 2008, Available at http://www.w3.org/TR/2008/WD-xhtml-rdfa-primer-20080620/ .
Latest version available at http://www.w3.org/TR/xhtml-rdfa-primer/ .
[RDFa Syntax]: RDFa in XHTML: Syntax and Processing. A collection of attributes and processing rules for extending XHTML to support RDF, Ben Adida, Mark Birbeck, Shane McCarron and Steven Pemberton, Editors, W3C Proposed Recommendation 4 September 2008.
Available at http://www.w3.org/TR/2008/PR-rdfa-syntax-20080904/ .
Latest version available at http://www.w3.org/TR/rdfa-syntax/.
[RDFS]: RDF Vocabulary Description Language 1.0: RDF Schema , Dan Brickley and R.V. Guha, Editors. W3C Recommendation, 10 February 2004,
Available at http://www.w3.org/TR/2004/REC-rdf-schema-20040210/ .
Latest version available at http://www.w3.org/TR/rdf-schema/.
[RDFXML]: RDF Vocabulary Description Language 1.0: RDF Schema , Dan Brickley and R.V. Guha, Editors. W3C Recommendation, 10 February 2004,
Available at http://www.w3.org/TR/2004/REC-rdf-syntax-grammar-20040210/ .
Latest version available at http://www.w3.org/TR/rdf-syntax-grammar/.
[RFC2119]: IETF RFC 2119: Key words for use in RFCs to Indicate Requirement Levels, S. Bradner, March 1997. Available at http://www.ietf.org/rfc/rfc2119.txt.
[RFC3986]: Uniform Resource Identifier (URI): Generic Syntax, T. Berners-Lee, R. Fielding, L. Masinter, IETF RFC3986, January 2004. Available at http://www.ietf.org/rfc/rfc3986.txt .
[RFC3987]: Internationalized Resource Identifiers (IRIs), M. Duerst & M. Suignard, IETF RFC3987, January 2005. Available at http://www.ietf.org/rfc/rfc3986.txt .

Date	Editor	Description
2008-10-17	johnston	public 1.0 release
2008-06-02	johnston/simeon	public beta 0.9 release
2008-02-29	johnston	public alpha 0.2 release (then part of rdfsyntax document)