Meta about issues relating to the numbering format presets found in the Page tab of the Page dialog, Customize tab of the Bullets and Numbering dialog, as well as other dialogs like Tools > Chapter Numbering and Tools > Line Numbering. In ODF it is found in <text:list-level-style-number> and its attributes style:num-format, style:num-prefix, style:num-suffix, and style:num-letter-sync. http://docs.oasis-open.org/office/v1.2/os/OpenDocument-v1.2-os-part1.html#__RefHeading__1416434_253892949
They can be found here in the code https://opengrok.libreoffice.org/xref/core/offapi/com/sun/star/style/NumberingType.idl
They translatable strings can be found here https://opengrok.libreoffice.org/xref/core/svx/inc/numberingtype.hrc