This is the abstract for your specification.


Atom+RDFa 1.1 is a specification for generating and processing RDFa 1.1 data in Atom 1.0 documents. It is inspired by Yahoo!'s DataRSS specification [[DATARSS]], and aims to retain compatibility with this where practical. It also aims to preserve the native semantics of Atom 1.0 documents.

An example Atom+RDFa document is shown below.

<?xml version="1.0" encoding="utf-8"?>
<feed xmlns=""

  <title>Example Feed</title>
  <link rel="self" href=""/>
    <name>John Doe</name>

    <title>Atom-Powered Robots Run Amok</title>
    <link rel="self" href=""/>
    <summary>Some text.</summary>
    <rdfa:meta property="dc:dateCopyrighted" content="2003-12-11" datatype="xsd:date" />
    <rdfa:meta rel="dc:rightsHolder">
      <rdfa:meta typeof="foaf:Person" property="foaf:name" content="John Doe" />


This is equivalent to the following RDF data, shown in Turtle [[TURTLE]]:

@prefix dc:   <> .
@prefix foaf: <> .
@prefix rel:  <> .
@prefix xsd:  <> .

_:feed rel:self <> .

_:entry rel:self <> ;
    dc:dateCopyrighted "2003-12-11"^^xsd:date ;
    dc:rightsHolder _:r .

_:r a foaf:Person ;
    foaf:name "John Doe" .

Conformance Requirements

Atom+RDFa 1.1 Processor Conformance

A conforming Atom+RDFa 1.1 processor MUST either fully process Atom+RDFa 1.1 according to the RDFa Core 1.1 [[!RDFA-CORE]] with the extensions defined in (even if that document is non-conforming according to ), or refuse to process the document at all (for instance if the XML is not well-formed).

Atom+RDFa 1.1 Document Conformance

All conformant Atom+RDFa 1.1 resources MUST be conformant to Atom 1.0 [[!RFC4287]].

This specification allows any attribute defined in RDFa Core 1.1 [[!RDFA-CORE]], to appear on any of the following elements:

  1. On extension elements (non-Atom namespace) which are the direct children of <feed>, and on elements which are the descendents of those.
  2. On extension elements (non-Atom namespace) which are the direct children of <entry>, and on elements which are the descendents of those.
  3. On elements that are descendants of Atom <content> elements which do not have a type attribute with value text or html.

The <rdfa:meta> Element

This specification defines a namespaced element <rdfa:meta> which allows any RDFa attribute to appear on it, as well as xml:base and xml:lang. The <rdfa:meta> element may be used as a child element of:

  1. <feed>
  2. <entry>
  3. <rdfa:meta> (That is, they may be nested to an aribtrary depth.)

This element has localname "meta" and namespace URI

This element is defined purely for convenience — RDFa is not limited to being used on this element only, and may also be used on other elements as detailed above.

Additional RDFa Processing Rules

Documents conforming to the rules in this specification are processed according to RDFa Core 1.1 [[!RDFA-CORE]] with the following extensions:

In Atom 1.0, rel defaults to "alternate".


Native Atom Semantics

@@TODO - maybe expand upon this section?

AtomOWL [[AWOL]] describes a mapping from Atom 1.0 syntax to an RDF vocabulary. This section provides guidelines for merging a graph produced from this mapping, with the Atom+RDFa 1.1 output graph.


Yahoo! published a specification for RDFa in Atom called "DataRSS". That specification is no longer available from the DataRSS website, but many of its design decisions influenced Atom+RDFa 1.1. Indeed, the concept of predefined prefixes in RDFa Core 1.1 owes much to DataRSS.

An Atom+RDFa 1.1 processor may be used to process DataRSS by adding the DataRSS Context [[DATACONTEXT]] to its initial context.

Relax NG Compact Schema

@@TODO - provide a schema for Atom+RDFa


Many thanks to Robin Berjon for making our lives so much easier with his cool tool.