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The XQJ classes are contained in the Java package javax. XQJ connections support creating and executing XQuery expressions. Expressions may be updating [10] and may include full text searches.
Each item in the sequence has XDM [1] type information associated with it, such as its node type e. The following example illustrates creating a connection to an XML Database , submitting an XQuery expression, then processing the results in Java. Once all of the results have been processed, the connection is closed to free up all resources associated with it. The following example illustrates how a Java value can be bound to an external variable in an XQuery expression.
Assume that the connection conn already exists. These mapping rules bear great similarities to the mapping rules found in JAXB.
The following table illustrates the default mapping rules for when binding Java values to external variables in XQuery expressions. The following is a couple of known implementations. The specification contains two separate licenses: The specification license allows free copying of the specification provided that copyright notices are retained; it also grants a license to create and distribute an implementation of the specification provided that it fully implements the entire specification, that it does not modify or extend any interfaces, and that it passes the compatibility tests.
This provision has caused some controversy. Firstly, it is not universally accepted that implementing a published specification is something that requires a license that is, that copyright law would disallow this in the absence of a license. This has led some open source enthusiasts to challenge whether XQJ implementations can ever be considered truly open source. The license for the reference implementation is a fairly conventional BSD-style open source license.
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