Improvements to P·C·D·M and Ore modelling

[Vocab] / data / classes / pcdm¦Collection

diff --git a/data/classes/pcdm¦Collection b/data/classes/pcdm¦Collection
index acc1b719347f1784fe400697fecd56622b98b199..6b45c28ef83e78d62a0c368f003ef8401b24cbf7 100644 (file)
--- a/data/classes/pcdm¦Collection
+++ b/data/classes/pcdm¦Collection
@@ -8,7 +8,12 @@ SPDX-License-Identifier: CC0-1.0
        <label xml:lang="en">Collection</label>
        <comment xml:lang="en">
                <p>
-                       A kind of <ref target="ore:Aggregation">Aggregation</ref> which can <ref target="pcdm:hasMember">have member</ref> <ref target="pcdm:Object">Objects</ref> or other Collections.
+                       An <ref target="ore:Aggregation">Aggregation</ref> which can <ref target="pcdm:hasMember">have member</ref> <ref target="pcdm:Object">Objects</ref> or other Collections.
+               </p>
+               <p>
+                       <ptr target="(PCDM)"/> defines semantics for <ptr target="rel:first" type="property"/> and <ptr target="rel:last" type="property"/> (to point to a <ref target="ore:Proxy">Proxy</ref> of the first member), but this is confused:
+                       These terms are meant to be used for horizontal linking between aggregation members, not vertical linking between aggregations and the things they aggregate.
+                       Consequently, the usage of these properties with Collections is not recommended by this ontology.
                </p>
        </comment>
        <isDefinedBy>