X-Git-Url: https://git.ladys.computer/Vocab/blobdiff_plain/91b1805cbc1b68e892c8ea96a4320faff21fef21..11a087890eb591019c19ec785d8179485a276910:/data/classes/pcdm%C2%A6Collection

diff --git "a/data/classes/pcdm\302\246Collection" "b/data/classes/pcdm\302\246Collection"
index acc1b71..6b45c28 100644
--- "a/data/classes/pcdm\302\246Collection"
+++ "b/data/classes/pcdm\302\246Collection"
@@ -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>