When you save a new document and table, DataEase creates many DOS files distinguished by different filename extensions:
File Type Filename Extension
Table Definition TDF
Style Sheet File STY
NOTE: DataEase creates a separate Index file for each column you index. The nn in the DOS filename for an Index file is a two-digit hexadecimal number that represents the relative position of the indexed field.
DataEase uses the following four rules to create the filename for each DOS file it creates:
1. The first four characters in the document name are the first four characters in the filenames Table Definition, Table Data, and Document file.
For example, DataEase uses CLUB as the first four characters when creating the DOS filename for the CLUBS database table (i.e., CLUBCAAA.TDF).
2. The first four characters in the Style Sheet name are the first four characters in the Style Sheet filename.
For example, DataEase uses CLUB as the first four characters when creating the DOS filename for the Club ParaDEASE Style Sheet (i.e., CLUBCAAA.STY).
3. The first letter in the application name is always the fifth letter in the DOS filenames it creates.
For example, DataEase uses the letter C as the fifth letter in each DOS filename it creates for the Club ParaDEASE application. Thus, DataEase uses CLUBC as the first five characters when creating the DOS filename for the CLUBS Multiform.
4. DataEase derives a unique filename for each DOS file by automatically incrementing the letters assigned to each type of file when assigning the last three letters in its filename.
For example, when you create the CLUBS table, DataEase names the Table Definition file CLUBCAAA.TDF. If you subsequently create the CLUB ACTIVITIES table, DataEase names the second Table Definition file CLUBCAAB.TDF (incrementing the last three letters from AAA, to AAB, to AAC, etc.).