here where I live and work we dont do a relational trauma matrix per se. our forms for both treatment providers and clients are not worded in matrix charting. thats not to say we dont document how trauma caused me ( as the client) or my client (me as the treatment provider) their symptoms/problems.

our forms are more like writing up session notes...example

clients name....Amandalouise
clients mental diagnosis.....PTSD
clients symptoms...Panic and Anxiety
clients goals /treatment options.....reduce panic and anxiety through use of mindfulness, grounding and medication.

Amandalouise comes to us for treatment of anxiety and panic issues related to a past history of abuse as a child. Due to her being taken into a mine shaft and abused she experiences anxiety when in tight, enclosed, crowded or dim to darkly lit places. .....

when we have our team meetings basically we introduce the case the same way...very basic. we dont go into each individual traumatic events.

I did have to do something similar to what you call a relational trauma matrix. only we called it a "case study" and "flow charts" where our professor gave us a paper with a mental disorder on it and we had to fill out all the different elements, while making up a hypothetical client, case history for that client, symptoms and treatment options. for me it was easy to do because my mental disorder for this assignment was dissociative disorders and I had DID, and depersonalization among others in the dissociative disorders category. so I basically used myself for the character composite in all the different charts. On the page where it said to show in a flow chart how each symptom and trauma was related I didnt list every single trauma I went through...to do that I would need stacks and stacks of flow charts. so I chose only a few to represent all the different ways in which trauma affected me.