Search for uv12~uv14~udt : {uv}glm_tool documentation

hello,

So, Universe >= r12 use the same lock system like Udt, I'm looking to deeply understand/tune it.

For admin & troubleshooting, there is a tool uvglm_tool / glm_tool  and uvulc_tool / ulc_tool, but they are not documented or I do not found any docs about it nor in Unidata docs.   

Is there anyone who have details about it ? How to read the info, use it ?

Perhaps docs/pdf/ppt/whitepaper/KB/...  from U2University conferences in the past ? 

I thank you by advance.