2.1 edmx:Edmx
The edmx:Edmx element defines the XML namespace for the EDMX document and contains the edmx:DataServices subelement.
The following example uses the edmx:EDMX element.
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<edmx:Edmx Version="1.0" xmlns:edmx="http://schemas.microsoft.com/ado/2007/06/edmx">
The following rules apply to the edmx:Edmx element:
An EDMX document MUST have exactly one edmx:Edmx element as its root element.
The Version attribute MUST be defined on the edmx:Edmx element. Version is of type xs:string, as specified in the XML schema [XMLSCHEMA1].
The edmx:Edmx element can contain a choice of zero or more of each of the following subelements:
edmx:Reference
edmx:AnnotationsReference
Subelements in a given choice set can appear in any given order.
The edmx:Edmx element specifies exactly one edmx:DataServices subelement. This subelement MUST appear after the edmx:Reference and edmx:AnnotationReference subelements, if present.