The document explains the differences between IDX and CDX files in Visual FoxPro indexing. IDX files are standalone and support single or combination indexes, requiring manual reindexing after transactions, while CDX files are compound, allowing multiple field indexes and automatically opening with the corresponding DBF. Additionally, it discusses commands for setting indexes for both file types.

2. IDX vs CDX
Visual FoxPro Index File

3. Topics
▪ IDX File
▪CDX File

4. IDX
▪IDX is standalone index file.
▪Single Field or One Combination index.
▪Reindex required if any transaction done without
opened index file.
▪Not auto open with DBF.

5. CDX
▪IDX is Compound index file.
▪Multi Fields or Multiple Combination index with in one
file.
▪Auto open with DBF.
▪SET ORDER TO command to set the required index.

6. COMMAND
▪ IDX File
Index on <FieldName> to <FileName>
Index on fullname to SyS(2015)+”.tmp”
▪CDX File
Index on <FieldName> Tag <FileName>
Index on fullname tagfullname