March 2003
Beginner to intermediate
688 pages
15h 53m
English
book
XML Data Management: Native XML and XML-Enabled Database Systems
by Akmal B. Chaudhri, Awais Rashid, Roberto Zicari
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3.5. Query Language Extensions
Let's take a quick look at some useful extensions eXist adds to standard XPath to enable you to efficiently use the database.
3.5.1. Specifying the Input Document Set
Since a database may contain an unlimited set of documents, two additional functions are required by eXist's query engine to determine the set of documents against which an expression will be evaluated: document() and collection(). document() accepts a single document name, a list of document names, or a wildcard as parameters. The wildcard (*) selects all documents in the database. The collection() function specifies the collection whose documents are to be included into query evaluation. For example:
collection('/db/shakespeare')//SCENE[ SPEECH[ ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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