The PL/I compiler provides an interface called PLISAXx (x = A or B) that provides you with basic XML capability. The support includes a high-speed XML parser, which allows programs to accept inbound XML messages, check them for being well-formed, and transform their contents to PL/I data structures.

The XML support does not provide XML generation, which must instead be accomplished by PL/I program logic. The XML support has no special environmental requirements. It executes in all the principal runtime environments, including CICS®, IMS™, and MQ Series, as well as z/OS® batch and TSO.