--- a/spec/latest/json-ld-syntax/index.html Wed May 16 20:21:45 2012 +0800
+++ b/spec/latest/json-ld-syntax/index.html Wed May 16 20:31:00 2012 +0800
@@ -542,12 +542,32 @@
<h2>Linking Data</h2>
<p>
-An Internationalized Resource Identifier
-(<tdef><abbr title="Internationalized Resource Identifier">IRI</abbr></tdef>),
-as described in [[!RFC3987]], is a mechanism for representing unique
-identifiers on the Web. In <tref>Linked Data</tref>, an IRI is commonly
-used for expressing a <tref>subject</tref>, a <tref>property</tref> or an
-<tref>object</tref>.
+The following definition for <tref>Linked Data</tref> is the one that will
+be used for this specification.
+</p>
+<ol>
+ <li><tdef>Linked Data</tdef> is a set of documents, each containing a representation of a linked data graph.</li>
+ <li>A <tdef>linked data graph</tdef> is an unordered labeled directed graph, where nodes are <tref>subject</tref>s or <tref>object</tref>s, and edges are properties.</li>
+ <li>A <tdef>subject</tdef> is any node in a <tref>linked data graph</tref> with at least one outgoing edge.</li>
+ <li>A <tref>subject</tref> SHOULD be labeled with an <tdef><abbr title="Internationalized Resource Identifier">IRI</abbr></tdef> (an Internationalized Resource Identifier as described in [[!RFC3987]]).</li>
+ <li>An <tdef>object</tdef> is a node in a <tref>linked data graph</tref> with at least one incoming edge.</li>
+ <li>An <tref>object</tref> MAY be labeled with an <tref>IRI</tref>.</li>
+ <li>A node MAY be a <tref>subject</tref> and <tref>object</tref> at the same time.</li>
+ <li>A <tdef>property</tdef> is an edge of the <tref>linked data graph</tref>.</li>
+ <li>A <tref>property</tref> SHOULD be labeled with an <tref>IRI</tref>.</li>
+ <li>An <tref>IRI</tref> that is a label in a <tref>linked data graph</tref> SHOULD be dereferencable to a <tref>Linked Data</tref> document describing the labeled <tref>subject</tref>, <tref>object</tref> or <tref>property</tref>.</li>
+ <li>A <tdef>value</tdef> is an <tref>object</tref> with a label that is not an <tref>IRI</tref></li>
+</ol>
+
+<p class="issue">An illustration of a linked data graph would probably help here.</p>
+
+<p>
+Note that the definition for <tref>Linked Data</tref> above is silent on the
+topic of unlabeled nodes. Unlabeled nodes are not considered
+<tref>Linked Data</tref>. However, this specification allows for the expression
+of unlabled nodes, as most graph-based data sets on the Web contain a number
+of associated nodes that are not named and thus are not directly
+de-referenceable.
</p>
<p>JSON-LD defines a mechanism to map JSON terms, i.e., keys and values, to IRIs. This does not mean
@@ -2524,36 +2544,6 @@
</section>
</section>
-<section class="appendix">
-<h2>Linked Data</h2>
-<p>
-The following definition for <tref>Linked Data</tref> is the one that will
-be used for this specification.
-</p>
-<ol>
- <li><tdef>Linked Data</tdef> is a set of documents, each containing a representation of a linked data graph.</li>
- <li>A <tdef>linked data graph</tdef> is an unordered labeled directed graph, where nodes are <tref>subject</tref>s or <tref>object</tref>s, and edges are properties.</li>
- <li>A <tdef>subject</tdef> is any node in a <tref>linked data graph</tref> with at least one outgoing edge.</li>
- <li>A <tref>subject</tref> SHOULD be labeled with an <tref>IRI</tref> (an Internationalized Resource Identifier as described in [[!RFC3987]]).</li>
- <li>An <tdef>object</tdef> is a node in a <tref>linked data graph</tref> with at least one incoming edge.</li>
- <li>An <tref>object</tref> MAY be labeled with an <tref>IRI</tref>.</li>
- <li>A node MAY be a <tref>subject</tref> and <tref>object</tref> at the same time.</li>
- <li>A <tdef>property</tdef> is an edge of the <tref>linked data graph</tref>.</li>
- <li>A <tref>property</tref> SHOULD be labeled with an <tref>IRI</tref>.</li>
- <li>An <tref>IRI</tref> that is a label in a <tref>linked data graph</tref> SHOULD be dereferencable to a <tref>Linked Data</tref> document describing the labeled <tref>subject</tref>, <tref>object</tref> or <tref>property</tref>.</li>
- <li>A <tdef>value</tdef> is an <tref>object</tref> with a label that is not an <tref>IRI</tref></li>
-</ol>
-
-<p>
-Note that the definition for <tref>Linked Data</tref> above is silent on the
-topic of unlabeled nodes. Unlabeled nodes are not considered
-<tref>Linked Data</tref>. However, this specification allows for the expression
-of unlabled nodes, as most graph-based data sets on the Web contain a number
-of associated nodes that are not named and thus are not directly
-de-referenceable.
-</p>
-</section>
-
<section class="appendix informative">
<h1>IANA Considerations</h1>