PRCT_HEAD_SE 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 "Header Fields Pricing Document (statistic; external fields)" 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_PRCT_HEAD_SE TYPE PRCT_HEAD_SE.
The PRCT_HEAD_SE table consists of various fields, each holding specific information or linking keys about Header Fields Pricing Document (statistic; external fields) data available in SAP. These include KAPPL (Application), KALSM (Pricing Procedure), VERSION (Version Number of Pricing Procedure), WAERK (Document Currency of Price Determination)... 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. .