Version of SQL language which can be used for writing queries is unspecified.
Add reference to the corresponding SQL standard.
p. 1090 Part 4/2.14.26
ed
Proposed Disposition of DIS 29500 Comment CZ-0049 (Modified: 2007-11-25) Agreed; the following changes will be made: To Part 4, §2.14.26, page 1090, lines 1517: This element contains the Structured Query Language string (as defined by the normative reference in Part 1) that shall be run against the specified external data source to return the set of records from the external data which shall be imported into merged WordprocessingML documents when the mail merge operation is performed. To Part 1, §3: ISO/IEC 9075-1:2003, Information technology - Database languages - SQL - Part 1: Framework (SQL/Framework)
