A tab-separated values (TSV) file is a simple text format for storing data in a
tabular structure, e.g., a
database table
A table is a collection of related data held in a table format within a database. It consists of columns and rows.
In relational databases, and flat file databases, a ''table'' is a set of data elements (values) using a model of vertical col ...
or
spreadsheet
A spreadsheet is a computer application for computation, organization, analysis and storage of data in tabular form. Spreadsheets were developed as computerized analogs of paper accounting worksheets. The program operates on data entered in ce ...
data, and a way of exchanging information between
database
In computing, a database is an organized collection of data stored and accessed electronically. Small databases can be stored on a file system, while large databases are hosted on computer clusters or cloud storage. The design of databases spa ...
s.
Each
record
A record, recording or records may refer to:
An item or collection of data Computing
* Record (computer science), a data structure
** Record, or row (database), a set of fields in a database related to one entity
** Boot sector or boot record, ...
in the table is one line of the
text file
A text file (sometimes spelled textfile; an old alternative name is flatfile) is a kind of computer file that is structured as a sequence of lines of electronic text. A text file exists stored as data within a computer file system. In operat ...
. Each field value of a record is separated from the next by a
tab character. The TSV format is thus a variation of the
comma-separated values
A comma-separated values (CSV) file is a delimited text file that uses a comma to separate values. Each line of the file is a data record. Each record consists of one or more fields, separated by commas. The use of the comma as a field separat ...
format.
TSV is a simple file format that is widely supported, so it is often used in
data exchange to move tabular data between different computer programs that support the format. For example, a TSV file might be used to transfer information from a database program to a spreadsheet.
The IANA standard for TSV
achieves simplicity by simply disallowing tabs within fields.
Example
The head of the
Iris flower data set can be stored as a TSV using the following plain text (note that the HTML rendering may convert tabs to spaces):
Sepal length Sepal width Petal length Petal width Species
5.1 3.5 1.4 0.2 I. setosa
4.9 3.0 1.4 0.2 I. setosa
4.7 3.2 1.3 0.2 I. setosa
4.6 3.1 1.5 0.2 I. setosa
5.0 3.6 1.4 0.2 I. setosa
The TSV plain text above corresponds to the following tabular data:
Conventions for lossless conversion to TSV
Since the values in the TSV format cannot contain literal tabs or newline characters, a convention is necessary for lossless conversion of text values with these characters. A common convention is to perform the following
escapes:
\n for newline,
\t for tab,
\r for carriage return,
\\ for backslash.
Another common convention is to use the CSV convention from {{IETF RFC, 4180 and enclose these special characters in double quotes. This can lead to ambiguities.
Another ambiguity is whether records are separated by newlines, as would be typical for lines on UNIX, or a carriage return followed by a newline, as would be typical for Microsoft platforms. Many programs such as LibreOffice expect a carriage return followed by a newline.
See also
*
Comma-separated values
A comma-separated values (CSV) file is a delimited text file that uses a comma to separate values. Each line of the file is a data record. Each record consists of one or more fields, separated by commas. The use of the comma as a field separat ...
*
Delimiter collision
References
Bibliography
*
IANA
The Internet Assigned Numbers Authority (IANA) is a standards organization that oversees global IP address allocation, autonomous system number allocation, root zone management in the Domain Name System (DNS), media types, and other Interne ...
, Text Media Types
Definition of tab-separated-values (tsv) Paul Lindner, U of MN Internet Gopher Team, June 1993
Jukka Korpela, created 2000-09-01, last update 2005-02-12.
External links
Gnumeric manual
Spreadsheet file formats
Delimiter-separated format