Assembly: Telerik.Reporting (in Telerik.Reporting.dll) Version: 188.8.131.522 (184.108.40.2062)
Property ValueType: String
A String started with "=" is interpreted as an expression to calculate the resulting id, otherwise - literal string. Supports embedded expressions also. When processed should evaluate to an unique value for each processing instance of the group. Any duplicated occurrences at runtime get modified in order to avoid duplication in the resulting report.