Scope note: This property associates a bibliographic agency (represented by one or more of its cataloguers) and the assigning of which expression is representative for a given Work. In cataloguing practice, such a relationship is usually just implicit. However, it can become explicit, for example when a bibliographic agency creates an authority record for a given work and fills the “Source” field with information about the publication that contains the expression that was used by the bibliographic agency to establish the uniform title for the work realised in that expression. Examples: - Assigning the musical text contained in the manuscript identified by shelfmark ‘MS-8282’ within the collections of the National Library of France, Department for Music, as representative for Stanislas Champein’s opera ‘Vichnou’ (F41) R44 carried out by The National Library of France, identified by code ‘FRBNF’ at the beginning of field 001 in the INTERMARC authority record for the author/title heading for Stanislas Champein’s opera ‘Vichnou’ (F44) - The assignment of the Sanskrit text contained in the book that was published in 1973 under the title ‘Pāṇinīyaṃ Sabdānuśāsanam’ as being a representative instance of F2 Expression for the textual work of Pānini titled ‘Astādhyāyī’ (F42) R44 carried out by The bibliographic agency identified, in field 040 of a MARC21 authority record for the author/title heading ‘Pānini. Astādhyāyī’, by the code ‘DLC’ (i.e., the Library of Congress) (F44)