Dynamic subsets allow TM1 modelers to create a collection of dimension elements based on the following criteria:

• Dimension hierarchy (element relationships)
• Element name patterns
• Element attribute values
• Cube data values

TM1 Dynamic Subsets are a great way to minimize application maintenance. Dynamic subsets definition is expressed using MDX language and is stored with the subset. Subset expression is evaluated when subset is referenced by the TM1 server.