NIEM-UML 1.0b2 FTF Avatar
  1. OMG Issue

UMLNIEM — PSM Representation for XSD Complex Type with Simple Content

  • Key: UMLNIEM-8
  • Legacy Issue Number: 18361
  • Status: closed  
  • Source: Visumpoint ( Tom Digre)
  • Summary:

    The PSM perspective of the current NIEM-UML Profile does not support constraint restrictions for XSD Complex Types with Simple Content.
    This capability is needed in extension schemas to help support enterprise/domain/exchange/context specific type constraints.
    The attached document provides some explanation of the requirement, the issue, and a proposed profile change

  • Reported: NIEM-UML 1.0b1 — Fri, 28 Dec 2012 05:00 GMT
  • Disposition: Resolved — NIEM-UML 1.0b2
  • Disposition Summary:

    Suggested Resolution:
    To enable representation of constraints on Complex Types with simple content (for models other than reference models), the following model construct changes/clarifications are proposed:
    • In the PSM perspective, a Class representing Complex Type with Simple Content (CSC) restricting (via <<Restriction>> Realization) another CSC, may define constraining facets via a DataType. In this case, there must be an <<XSDSimpleContent>> Realization whose supplier is the DataType and whose client is the CSC. The <<Restriction>> Realization is implemented in XML Schema through the base attribute on the xsd:restriction element of the CSC (as previously). The constraining facets defined by the DataType are used to populate the content of the xsd:restriction.
    • The mapping from PIM to PSM includes a fabricated DataType and <<XSDSimpleContent>> Realization to represent the constraints modeled within the PIM perspective.
    The suggested resolution is accepted. Within the PSM perspective, constraining facets on a UML Class representing Complex Type with Simple Content (CSC), which is a restriction of another CSC, shall be represented using the <<XSDSimpleContent>> Realization and a DataType defining the facets.

  • Updated: Fri, 6 Mar 2015 20:58 GMT