[1] 
>
:Implementation-Defined:    An implementation-defined feature or behavior may vary among model processors; the precise behavior is not specified by this specification but MUST be specified by the implementor of each model processor.


;; [CITE@en-US[Service Modeling Language, Version 1.1]] ([TIME[2009-05-12 17:50:10 +09:00]] 版) <http://www.w3.org/TR/2009/REC-sml-20090512/#implementation_defined>

;; [CITE@en-US[Service Modeling Language Interchange Format Version 1.1]] ([TIME[2009-05-12 17:50:21 +09:00]] 版) <http://www.w3.org/TR/2009/REC-sml-if-20090512/#implementation_defined>

[2] [CITE[XProc: An XML Pipeline Language]]
([TIME[2010-05-11 22:38:07 +09:00]] 版)
<http://www.w3.org/TR/2010/REC-xproc-20100511/#dt-implementation-defined>

[3] [CITE@EN[XQuery 1.0 and XPath 2.0 Formal Semantics (Second Edition)]]
( ([TIME[2010-12-17 00:07:45 +09:00]] 版))
<http://www.w3.org/TR/2010/REC-xquery-semantics-20101214/#dt-implementation-defined>

[4] [CITE@en[XQuery 1.0 and XPath 2.0 Data Model (XDM) (Second Edition)]]
( ([TIME[2010-12-17 00:06:35 +09:00]] 版))
<http://www.w3.org/TR/2010/REC-xpath-datamodel-20101214/#dt-implementation-defined>

[5] [CITE@en[XSLT 2.0 and XQuery 1.0 Serialization (Second Edition)]]
( ([TIME[2010-12-17 00:08:20 +09:00]] 版))
<http://www.w3.org/TR/2010/REC-xslt-xquery-serialization-20101214/#impdef>