SystemWeaver reports can be parameterized as described in Parameterized Reports. However, setting a parameter in a Document is not possible using <Parameters>. Instead, you would include the parameter for what you want to select as a section item in the document. 

In the below report example, Component A is selected and the parameter being reported on is Parameter Example Architecture (2): 

To do this in a Document, you would include Parameter Example Architecture (2) as a section item in the document and define what you need in the document's XML definition: