CR — Missing reference to XML Schema and XPath specification

Chapter 3 References is missing references to XML Schema and XPath specifications.
XML Schema: That is important because section "5.1.4.1 Property" indicates that "Property types are derived from the top-level built-in primitive types of XML Schema". Furthermore, it indicates the reader should "see the description of the individual types in the XML Schema specification for an exact definition of the value space."
XPath: That is important because Table 5.2 describe the default expression language as “http://www.w3.org/1999/XPath.” and section 7.3 indicates that "An implementation that uses XPath as expression language (see 5.1.2), MIGHT use XPath Extension Functions to implement those operations."

Add the XML Schema and XPath specifications as a non-normative reference in chapter 3.2

CMMN section "5.1.4.1 Property" indicates that "Property types are derived from the top-level built-in primitive types of XML Schema". Furthermore, it indicates the reader should "see the description of the individual types in the XML Schema specification for an exact definition of the value space." Therefore, we should add XML Schema to chapter 3 references. in addition, Table 5.2 describe the default expression language as “http://www.w3.org/1999/XPath.” and section 7.3 indicates that "An implementation that uses XPath as expression language (see 5.1.2), MIGHT use XPath Extension Functions to implement those operations."

Note that BPMN 2.0.2 only list as normative references (section 3.2) UML, MOF, and RFC-2119. All other references including XML Schema, WSDL, XPath, etc. are listed as non-normative (section 3.3).

Therefore the proposal is to list XML Schema and XPath as non-normative in CMMN.

Add to section 3.2 Non-normative References, the following two (reference) paragraphs:

Man, H. de, Case Management: A Review of Modeling Approaches, BPTrends, January 2009. [http://www.bptrends.com/
publicationfiles/01-09-ART-%20Case%20Management-1-DeMan.%20doc--final.pdf ]

XML Schema Part 2: Datatypes, Paul V. Biron and Ashok Malhotra, eds., W3C, 28 October 2004. http://www.w3.org/TR/xmlschema-2/

XML Path Language (XPath) 1.0, James Clark and Steve DeRose, eds., W3C, 16 November 1999. http://www.w3.org/TR/xpath