2.1.687 Part 1 Section 18.5.2.4, xmlPr (Column XML Properties)
a. The standard specifies the value range for @xpath to be ST_Xstring.
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Office requires that the value of attribute xpath be greater than 0 and less than 32000 characters.
b. The standard specifies that attribute mapId has the value range of xs:unsignedInt.
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Office requires that the value of attribute mapId be greater than or equal to 1 and less than or equal to 2147483647.