* {{Code|txtr}}: Index file with references to ID lists.
The '''Attribute Index''' is contained in the files {{Code|atvl}} and {{Code|atvr}}; it uses the same layout.
For a more detailed discussion and examples of these file formats please see [[Index File Structure]].
==Full-Text Fuzzy Index: {{Code|ftxx}}, {{Code|ftxy}}, {{Code|ftxz}}==