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Due to processing by IBM, this request was reassigned to have the following updated attributes:
Brand - Servers and Systems Software
Product family - Transaction Processing
Product - CICS Transaction Server
For recording keeping, the previous attributes were:
Brand - WebSphere
Product family - Transaction Processing
Product - CICS Transaction Server
The "pattern" facet in XML is for specifying a Regular Expression against which the contents of an XML element must match, for validation purposes. Any Regular Expression is valid, though this requirement only asks for validation of the length. There are other (better) ways to define the maximum length of a field in an XML schema. The example quoted requires the contents to be numeric, something that could be enforced by using a more specific data-type (an xsd:integer with totalDigits=9 comes to mind, rather than an xsd:string and a Regular Expression), and which would map appropriately.
At the moment we have no support in the CICS data transformation/mapping service for Regular Expression based validation. We tolerate the presence of Regular Expressions in the Schema, but don't do anything with them, other than echoing them into the generated copy-books for informational purposes. Looking at current plans, it is not likely that this would be implemented in the next two CICS TS releases, so correspondingly this requirement is being rejected. You have an opportunity to resubmit in eighteen months time if you wish it to be considered then.