It was to prevent confusion between XML schema pattern facet and DFDL text number and text calendar patterns.

Regards

Steve Hanson
Architect, IBM Data Format Description Language (DFDL)
Co-Chair, OGF DFDL Working Group
IBM SWG, Hursley, UK
smh@uk.ibm.com
tel:+44-1962-815848



From:        Mike Beckerle <mbeckerle.dfdl@gmail.com>
To:        dfdl-wg@ogf.org,
Date:        15/05/2013 18:51
Subject:        [DFDL-WG] rationale for only allowing pattern facet on xs:string        type
Sent by:        dfdl-wg-bounces@ogf.org

---

The pattern facet is allowed on all types in XML Schema.

DFDL says the XSDL pattern facet is for xs:string type elements only.

What is the rationale for this restriction?

We are encountering many constraints in format specs that are using XML Schema regular expressions, where those regex are applied to numeric types (e.g., xs:decimal for lattitude and longitude).


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Mike Beckerle | OGF DFDL Workgroup Co-Chair | Tresys Technology | www.tresys.com
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