Merge branch '63-objectPublishedID-Description' into 'develop'

Clarify role of pref attribute for objectPublishedID

See merge request lido/development!78

1.1/lido-v1.1-public-beta.xsd

@@ -1847,7 +1847,7 @@ For a summary of changes please refer to the repository’s README. The full his
 					<xs:documentation>
 						<tei:ab type="description">A published identifier of the object or work in focus.
 							It is strongly recommended to provide a dereferenceable URI.<br />
-							Repeated for identifiers from different authority files or other sources.
+							Repeated for identifiers from different authority files or other sources. If there are multiple published identifiers use the <tei:ref target="#pref">pref</tei:ref> attribute to mark the one preferred by the provider of the LIDO record.
 						</tei:ab>
 						<tei:ab type="label">Published Object Identifier</tei:ab>
 					</xs:documentation>