adl:subject-related text

The adl:subject-related text bucket contains text gleaned or derived from the object's detailed (that is, collection-specific) metadata, that indicates any topics or themes associated with the object.

Topical text is the most loosely specified of the buckets. It is an an aggregation of words and phrases, from any underlying attribute, that indicate the object's topic or theme (such as title, abstract, subject, etc.) (As a limiting case, the adl:subject-related text bucket could be populated with textual representations of all an object's metadata, although we don't recommend this.)

The adl:subject-related text, adl:assigned terms, adl:originators, and adl:identifiers buckets are all searchable with the standard ADL text operators:

• any word: true if the target bucket contains any of the query words, anywhere and in any order.
• all words: true only if the target bucket contains all of the query words, anywhere and in any order.
• exact phrase: true only if the target bucket contains the query phrase as a proper substring.

This set of operators was selected as a reasonable trade-off between query power and ease of efficient implementation on a variety of platforms.