Parses a summary specification string into a structured IXmlSummary object.
Format: "targetNode,orientation,groupingField:groupingName,fieldName:displayName:measure,..."
Example: "Item,1,Category:Group,Price:Total Price:1,Qty:Count:2"
Compact summary spec string following the defined structure.
Parsed IXmlSummary object.
If the string is malformed or has an invalid measure/format.
Parses a summary specification string into a structured IXmlSummary object.
Format: "targetNode,orientation,groupingField:groupingName,fieldName:displayName:measure,..."
Example: "Item,1,Category:Group,Price:Total Price:1,Qty:Count:2"