In computing, Extensible Markup Language (XML) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable through use of tags that can be created and defined by users.Much like natural language is extensible (that is, can grow) when speakers create new words and agree on what they mean, XML is a markup language that can grow when users create new elements and agree on what they mean.The z/OS V1.12 XML System Services validating parser provides up to 30-50% improvement over the z/OS V1.11 XML System Services validating parser.
z/OS XML System Services is a high performance validating and non-validating parser, with a unique buffer-in/buffer-out design to minimize application-to-parser API overhead, and allow the application complete control over the post-parse processing.
z/OS XML System Services continues to focus on performance from release to release, with a strong focus on achieving parity or improving performance between releases.
The reported cpbp was determined by calculating the geometric mean of the per byte costs for all benchmark documents.
Because of the unique design of z/OS XML System Services, comparisons with other parsers using the SAX or DOM APIs should be judged in light of their different designs.
A DTD (Document Type Definition) defines the form and syntax of XML language constructs.
You create DTDs using simple rules that can seem far more complex than they really are.
z/OS XML System Services has added benefits of running on z Application Assist Processors (z AAPs) for all task-mode parsing and z Integrated Information Processors (z IIPs) for all enclave SRB mode parsing.
These represent significant reductions in customer cost, reflecting IBM's strategy to provide price/performance benefits for new application workloads considered strategic for System z.
It is a textual data format with strong support via Unicode for different human languages.
Although the design of XML focuses on documents, the language is widely used for the representation of arbitrary data structures such as those used in web services.
XML schema is supported in a similar way, but requires an explicit schema to be provided: As described above, the parser support for DTDs depends on internal or external subsets of the XML file.