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The comma-separated values file format is a set of file formats used to store tabular data in which numbers and text are stored in plain textual form that can be read in a text editor. Lines in the text file represent rows of a table, and commas in a line separate what are fields in the tables row. Different implementations of CSV arise as the format is modified to handle richer table content such as allowing a different field separator character (necessary if numeric fields are written with a comma instead of a decimal point) or extensions to allow numbers, the separator character, or newline characters in text fields. (Excerpt from Wikipedia article: Comma-separated values)