COML_PRCAT_IL_REL is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "Assignment Category - Relationship Type (UI Structure)" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_COML_PRCAT_IL_REL TYPE COML_PRCAT_IL_REL.
The COML_PRCAT_IL_REL table consists of various fields, each holding specific information or linking keys about Assignment Category - Relationship Type (UI Structure) data available in SAP. These include CLIENT (Client), CATEGORY_GUID (Category GUID), IL_RELTYPE (Relationship Type), IL_DIRECTION (Defines the Direction of a Directed Relationship)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .