<xsd:element name="sql" type="oval-def:EntityObjectStringType">
<xsd:annotation>
<xsd:documentation>The sql entity defines a query used to identify the object(s) to test against. Any valid SQL query is usable with one exception, at most one field is allowed in the SELECT portion of the query. For example SELECT name FROM ... is valid, as is SELECT 'true' FROM ..., but SELECT name, number FROM ... is not valid. This is because the result element in the data section is only designed to work against a single field.</xsd:documentation>
<xsd:appinfo>
<sch:pattern id="sqlobjsql" xmlns:sch="http://purl.oclc.org/dsdl/schematron">
<sch:rule context="ind-def:sql_object/ind-def:sql">
<sch:assert test="not(@datatype) or @datatype='string'">
<sch:value-of select="../@id" /> - datatype attribute for the sql entity of a sql_object should be 'string'</sch:assert>
</sch:rule>
</sch:pattern>
</xsd:appinfo>
</xsd:annotation>
</xsd:element>
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