A section of plain text describing the publication's content. Because it is not part of the SML code, this description does not have to be written in lower case only.
Provides an element with a unique name within a single document. This is especially useful in works with extensive cross-referencing and linking, such as dictionaries, encyclopedias, or travel guides. Use of ids simplifies linking and updates.
xml language code.
Always equal to "http://purl.org/dc/elements/1.0/"