# LibreOffice API IDL Files Except UDK API Contains all of the IDL files except those in `udkapi`. i.e. the interfaces that are specific to the LibreOffice application. An artificial (?) separation. The reference `offapi/type_reference/offapi.idl` and `udkapi/type_reference/udkapi.idl` (formerly combined into a single `offapi/type_reference/types.rdb`) are used to detect inadvertent incompatible changes. They are plain-text `.idl` files (not strictly lexicographically sorted, though, so they satisfy the `.idl` file requirements for no forward dependencies), so in cases where we deliberately /do/ become incompatible they can be modified manually. Old such cases of deliberately becoming incompatible are listed in `offapi/type_reference/typelibrary_history.txt`, newer such cases are recorded in the `git log`s of (now superseded) `offapi/type_reference/types.rdb`, `offapi/type_reference/offapi.rdb`, and `udkapi/type_reference/udkapi.rdb`, new such cases are recorded in the `git log`s of `offapi/type_reference/offapi.idl` and `udkapi/type_reference/udkapi.idl`.