LIME_EXTDATA 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 "MIGO External Data for MTQ" 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_LIME_EXTDATA TYPE LIME_EXTDATA.
The LIME_EXTDATA table consists of various fields, each holding specific information or linking keys about MIGO External Data for MTQ data available in SAP. These include MANDT (Client), MBLNR (Number of Material Document), MJAHR (Material Document Year), LINE_ID (Unique identification of document line)... 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. .