MDG Transforms - Query Tagged Values - refGUIDList

[Tas]

I am trying to work with some custom transformations to do some what I think should be relatively simple tasks, but my programming skills are average, and I am having trouble getting the details right. If anyone can help, I would appreciate it.

Scenario:
1. Package of Classes representing Logical Business Entities. (Zachman Row 3, Column 1).

2. I transform these to another package (Zf R4, C1) where I want to make decisions about the implementation (configuration) technologies, and then transform to the specific technology packages in Row 5.

I use a tagged value in the R4 classes called "Configurations", which is a refGUIDList type, taking its values from another package of classes (all stereotyped as ConfigurationTechnology). This gives me a multivalued tag containing the GUIDS of the classes used to enumerate the implementation.   In the EA interface this shows simply as a comma separated list of the class names.

3. I want to customise a transform targeted for each specific technology so that it reads the tagged value of the source class (the R4 one), and only does the transform if it is listed in the Configurations tagged value. I cant find a way to interogate the tags - does anyone know how to do this?

Related Question - does anyone know how to delete a transform that is no longer needed or even re-name it and re-purpose it?