Binding Syntax

Binding Syntax

This project is a joint effort between Implementation and Conformance and vocabulary.

Scope

Define the expression of the vocabulary constraints in implementation guides. Define the expression of the Value Set Assertion, a Model Binding, a Context Binding, and a Context Domain constraint. Information expressed in the syntax should be isomorphic to the normative definition of the data items comprising vocabulary constraints in Core Principles and the MIF ballots.

Requirements

• model binding to a single code or Value Set Assertion
• context binding to a Value Set Assertion
• dynamic/static stability
• identification of MIN/MAX/IGNORE value sets in Value Set Assertion
• identification of Coding Strength in the Value Set Assertion
• constraining of a Concept Domain to a sub-Domain
• publication of value set expansions (appendix)

Keywords

The keywords SHALL, SHOULD, MAY, NEED NOT, SHOULD NOT, and SHALL NOT in this document are to be interpreted as described in the HL7 Version 3 Publishing Facilitator's Guide. The keyword "SHALL" implies a lower cardinality of 1 but does not disallow NULL values. If NULL values are to be excluded, it will be via an additional explicit conformance statement.

BNF grammar

BindingSyntax := "A" <elementName> ["SHALL" | "SHOULD" | "MAY" ] "be present where the value of" <elementName> "is" [ <ValueSet> | <CodeX> ] "."

<ValueSet> := "selected from Value Set" <valueSetOID> <localValueSetName> [ "DYNAMIC" | "STATIC"] (valueSetEffectiveDate) "."

<CodeX> := [ <displayName> ] <codeSystemOID> [ <codeSystemName> ] "STATIC".

Examples

CONF-ex1: A code element SHALL be present where the value of @code is selected from Value Set 2.16.840.1.113883.19.3 LoincDocumentTypeCode DYNAMIC.

CONF-ex2: A code element SHALL be present where the value of @code is 34133-9 Summarization of episode note 2.16.840.1.113883.6.1 LOINC STATIC.

Open Issues

• conditions (true/false)
• combined constraints: to be concatenated via "and" (must be reflected in BNF grammar)