2.2.5.26 Expression Object

The Expression object represents a named expression that can be used by one or more partitions. It is a child of a Model object and requires compatibility level 1400 or higher.<82>

The Expression object has the following properties.

Name	Type	Description
ID	unsignedLong	A reference to the object.
ModelID	unsignedLong	An ID-based reference to a Model object.
Name	string	The name of the object.
Description	string	The description of the object.
Kind	enumeration	The kind of the expression. The possible values are as follows: M (0) – An expression that is based on M (Power Query Formula Language). For more information about M, see [MSDN-PwrQFormRef].
Expression	string	The descriptive text of the expression.
ModifiedTime	dateTime	The time that the object was last modified.
QueryGroupID <83>	unsignedLong	An ID-based reference to a QueryGroup object. Compatibility level 1500 or higher is required.
ParameterValuesColumnID <84>	unsignedLong	An ID-based reference to a Column object. Compatibility level 1600 or higher is required.
MAttributes <85>	string	A set of optional properties that can be used to define the literal attributes on the section members of the M queries. Compatibility level 1600 or higher is required.
LineageTag <86>	string	An optional tag that can be used to define the lineage of an expression across different versions of a model. Compatibility level 1600 or higher is required.
SourceLineageTag <87>	string	An optional tag that can be used to define the lineage of a referenced expression across different versions of a model. As opposed to LineageTag, SourceLineageTag can be used to define the lineage of a referenced expression rather than an expression itself. SourceLineageTag is useful when a model references other models by using a Direct Query connection. Compatibility level 1600 or higher is required.

Last updated on 2025-08-29