DEFAULT_CAT.MDB using search sequence 'C'.DEFAULT_CAT.MDB located in the same folder as the._CAT.MDB located in the same folder as the.The following naming convention and search sequence is used: It is also referenced when generating bill of materials reports. Project specific Access database for choosing catalogue part number assignments. Text files created and managed by AutoCAD Electrical utilise the Unicode format and can be edited using Notepad or similar. These files provide various functions such as keeping a project consistent, helping update custom title blocks across a project, or providing custom settings for various tools such as the PLC I/O module insertion tool. AutoCAD Electrical supports optional project-related files.