All compound indexes are compact indexes.
One file structure exists to track all the tags in the .cdx file. This structure is identical to the compact index file structure with one exception вЂ” the leaf nodes at the lowest level of this structure point to one of the tags in the compound index.
All tags in the index have their own complete structure that is identical to the compact index structure for an .idx file.
Other ResourcesFile Structures
Index File Structure (.idx)
Compact Index File Structure (.idx)
Table File Structure (.dbc, .dbf, .frx, .lbx, .mnx, .pjx, .scx, .vcx)
Table Structures of Table Files (.dbc, .frx, .lbx, .mnx, .pjx, .scx, .vcx)
Memo File Structure (.FPT)
Macro File Format (.fky)
File Extensions and File Types