model/prov-dm.html
changeset 4583 b1221185c8a9
parent 4566 60b6ee097555
child 4594 f63988013a9f
--- a/model/prov-dm.html	Mon Oct 29 22:40:24 2012 -0700
+++ b/model/prov-dm.html	Tue Oct 30 10:07:50 2012 +0000
@@ -1717,7 +1717,7 @@
 <p><div class="attributes" id="attributes-entity">An <dfn title="dfn-Entity" id="dfn-entity">entity</dfn><span class="withPn">, written <span class="pnExpression" id="pn-entity">entity(id, [attr1=val1, ...])</span> in PROV-N, </span> has:
 <ul>
 <li><span class='attribute' id="entity.id">id</span>: an identifier for an entity; </li>
-<li><span class='attribute' id="entity.attributes">attributes</span>: an OPTIONAL set of attribute-value  pairs ((<span class="name">attr1</span>, <span class="name">val1</span>), ...) representing additional information about this entity.</li>
+<li><span class='attribute' id="entity.attributes">attributes</span>: an OPTIONAL set of attribute-value  pairs ((<span class="name">attr1</span>, <span class="name">val1</span>), ...) representing additional information about the fixed aspects of this entity.</li>
 </ul></div>
 
 <div class="anexample" id="anexample-entity">
@@ -3183,6 +3183,10 @@
  name</a>. 
 </p>
 
+<p><a>Entity</a>, <a>Activity</a>, and <a>Agent</a> have a mandatory identifier. Two entities (resp. activities, agents) are equal if they have the same identifier.</p>
+
+<p><a>Generation</a>, <a>Usage</a>, <a>Communication</a>, <a>Start</a>, <a>End</a>, <a>Invalidation</a>, <a>Derivation</a>, <a>Attribution</a>, <a>Association</a>, <a>Delegation</a>, <a>Influence</a> have an optional identifier. Two generations (resp. usages, communications, etc.) are equal if they have the same identifier.
+
 </section>
 
 <section id="term-attribute">
@@ -3925,6 +3929,7 @@
 <li> <a href="http://www.w3.org/2011/prov/track/issues/502">ISSUE-502</a>: Added sentence in section 2.1.2 explaining that the focus
       of derivation is on connecting a generated entity to a used  entity.
 <li> <a href="http://www.w3.org/2011/prov/track/issues/526">ISSUE-526</a>: Added sentence clarifying sentence in section 5.5.2.
+<li> <a href="http://www.w3.org/2011/prov/track/issues/462">ISSUE-462</a>: Added clarification regarding entity attributes (with respect to fixed aspects) and role of identifier with respect to equality.
 </ul>
 
 </section>