BW Table Name /BIC/AZMV1AX1400

I am working for a customer who's BW system is growing quite quickly.

The fastest growing table is this:

Table Name:          /BIC/AZMV1AX1400

Data Tablespace:     BWP#ZMV1DD

I can't find references to either of these in OSS, SCN, Google, etc.

The Table Name has an SAP standard naming convention, but the Data Tablespace has a Z naming convention, which implies that it is custom.

Please can you tell me how the Data Tablespace was created? Is there a way to limit the growth and safely delete old data from tables such as these?

Thanks.