format
File names should be descriptive and reflect the file content.
When planning your project, define what types of data will be produced and what format these data will take.
Description of formats for date and time
How to describe the contents of a data file
One should be consistent in the types of data included in columns of spreadsheets or data tables.
Keep descriptions and flags for data separate from values
Fields within a data file should be consistently separated by acceptable delimiters (e.g. commas).