[type of data: composed data (literal); not repeatable]
- To distinguish one expression from another in cases in which both long and short expressions of the same work exist.
- To characterize the expression for a user unfamiliar with it.
Record the extent of the expression, if possible, in terms that will apply to all manifestations of the expression. In some cases, the extent can be expressed in terms of numbers of pages (as in the case of expressions produced by means of new settings of type). In some cases, the extent can be expressed in terms of footage or playing time. In the case of music, extent can be expressed in terms of the number of measures. In some cases, the extent can be expressed in terms of other types of counts.
xvii, 323 pages
1 score (viii, 278 pages), 24 parts
If two manifestations are known to be the same expression (identical content) but they differ in extent count, see 4.3.1.