XPCML schema and syntax

XPCML documents, called XPCML source files, contain tags and data that fully define calls to programs on your iSeries™ server.

Because XPCML uses XML schemas instead of a document type definition (DTD), you can use XPCML in ways that you cannot use PCML:

Pass values for input parameters to your program as XML elements
Receive values for output parameters from your program as XML elements
Have the XML parser automatically validate the values passed to your program
Extend the schema to define new simple and complex elements

For more information about the XPCML schema and syntax, see the following pages:

Comparison of XPCML source to PCML source
XPCML differs from PCML in several ways, but one major difference is that XPCML allows you to specify the values of input parameters within the XPCML source file.
Schema xpcml.xsd file
XPCML syntax
The XPCML schema defines several element tags, and each element tag contains attribute tags.
XPCML tag attributes
The XPCML schema defines several element tags, and each element tag contains attribute tags. The following table lists and describes the different attributes for each element.

Parent topic: Extensible Program Call Markup Language

Comparison of XPCML source to PCML source
Examine examples that compare XPCML source and PCML source. The examples illustrate how XPCML provides more functionality and makes the source data easier to read and write.

XPCML schema
Examine the XPCML schema file and learn more about using and extending the XPCML schema.

XPCML syntax
Review a list of XPCML syntax elements that the schema uses to define the XPCML elements.

XPCML tag attributes
Description of the different attributes for each element XPCML schema defines.