Nearly every library part has string parameters. This post is about the possible solutions of string handling.
2 ways of summarizing values
Summarizing values according to the Calculate Totals option in Project Preferences/Calculation Units & Rules.

How to use the GDL Debugger?
Access and use the GDL debugger tool shipped with ARCHICAD.

How to create your own subtype?
Step-by-step tutorial to make your own subtype

How to use the LP_XMLConverter tool?
Convert .gsm objects into editable text files (.xml) and pictures.

HSF source format
Example objects for this post In ARCHICAD 23 a new source format has been introduced for handling the GDL objects as text files: the Hierarchical Source Format (HSF). This post introduces the parts of this source format and flies through the conversion of a library from XML format to…

Replacing parameter default values in .xml format
Parameter default value replacement method tutorial based on .xml format
