COMT_ATTR_DEFAULT_MAINTAIN 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 "API Structure: Default Value of Attribute" 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_COMT_ATTR_DEFAULT_MAINTAIN TYPE COMT_ATTR_DEFAULT_MAINTAIN.
The COMT_ATTR_DEFAULT_MAINTAIN table consists of various fields, each holding specific information or linking keys about API Structure: Default Value of Attribute data available in SAP. These include DEFAULT_VALUE (Single Value or Lower Limit of Interval)... 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. .