Hi @kpeng, generally it's possible if each feature has these three kinds of attributes.

• <name>: stores a string value that will be used as a new attribute name after transposing.
• <value>: stores a value that will be saved into the new attribute
• <id>: stores unique ID for new features after transposing

The procedure would be:

1. Rename <value> to the value of <name> for each feature (or create a new attribute whose name is the value of <name> and stores the value of <value>).
2. Aggregate the features and merge their attributes, with setting <id> to the Group By parameter.
3. Optionally expose the new attribute names (i.e. all the possible values of <name>).