line number tag population

I wish to populate the raw opim isometric with the line number tag.

Modelling in AutoPLANT V8I SS8 2016.

OPIM for isometric generation.

When creating an isometric from, for example , PIPE LINE "100-WW-01234"  (100 BEING THE SIZE, WW BEING THE SERVICE AND 01234 BEING THE LINE NUMBER)....I wish the isometric to populate the line number tag in the title block with : "-XX-WW-01234".

Is anyone able to enlighten me on the proceedure?.

thanks to anyone with an answer.