Process Developer

Back Next

Selecting XPath or XQuery for Expression Building

The default language is XQuery, which is a superset of XPath. Process Developer projects contain an XQuery nature, including an XQuery editor for writing custom function XQuery modules.

The following table provides a brief comparison between XPath and XQuery as used in BPEL data mapping:

XPath	XQuery
Recommended if portability is an issue. Language is supported by WS-BPEL 2.0	Process Developer extension for BPEL
May be more suitable for multiple-part message variables	Builds large documents easily from a single-part variable
Limited to expression evaluation of one document node at a time	Allows manipulation of data from an entire XML document
	Better at date handling, with many date functions
Location path expressions resolve to a string	Queries generate an XML result
Location path expressions resolve to a string	Similar to a SQL-like query language. Easier to iterate over repeating elements with "FLWOR expressions" (FOR, LET, WHERE, ORDER BY, and RETURN) for performing joins

Rename Saved Search

Table of Contents

Process Developer

Process Developer

Selecting XPath or XQuery for Expression Building

Selecting XPath or XQuery for Expression Building