Categories
Recfiles
From Wikipedia - Reading time: 6 min
| Filename extension |
.rec |
|---|---|
| Type of format | Data interchange |
| Open format? | yes |
| Free format? | yes |
| Website | www |
recfiles is a file format for human-editable, plain text databases.[1][2]
| GNU Recutils | |
|---|---|
| Original author(s) | Jose E. Marchesi |
| Initial release | December 3, 2010 |
| Stable release | 1.9
/ April 16, 2022[3] |
| Repository | git |
| Written in | C |
| License | GNU General Public License |
| Website | www |
Databases using this file format can be edited using any text editor. Recfiles allow for basic relational database operations, such as typing, auto-incrementing, as well as a simple join operation.
Recutils is a collection of tools, like recfmt, recsel, and rec2csv used to work with recfile databases.[4] Various software libraries support the format.[5][6][7]
Syntax
[edit]Data are stored in text files with empty lines separating records. Fields within a record are lines starting with their name and a colon; it is possible to wrap long entries. Multiple record types can be maintained in a single text file.
Example
[edit]# This is a recfile document.
%rec: Text
%type: Year int
Author: Doug McIlroy
Year: 1964
Note: The Origin of Unix Pipes
Title: Unix Text Processing
Author: Dale Dougherty
Author: Tim O'Reilly
Year: 1987
Publisher: Hayden Books
Author: William Shakespeare
Title: Hamlet
Year: 1599
Year: 1600
Year: 1601
Utilities
[edit]Recutils from the GNU Project are a set of free command line utilities to process recfiles.[8] These include:
- recsel – search for and print fields from records matching a query
- recins – insert a record, or replace existing records
- recdel – delete a record, or delete a set of records
- recfix – sort the records
- recset – add or update individual fields
This example command would output the following three lines (of the two original entries, one having two authors):
$ recsel -e 'Year > "1900"' -p Author
Author: Doug McIlroy
Author: Dale Dougherty
Author: Tim O'Reilly
See also
[edit]
References
[edit]- ^ Marchesi, Jose E (2019-01-03). "Purpose". GNU Recutils Manual. Retrieved 2020-12-02.
- ^ James Tomasino (2020-01-26). "GNU Recutils". Retrieved 2020-02-09.
- ^ "Index of /gnu/recutils". ftp.gnu.org. Retrieved 11 April 2023.
- ^ "GNU Recutils - GNU Project - Free Software Foundation".
- ^ František Kučera (2019-04-08). "Relational pipes and GNU Recutils".
- ^ "Python-recutils". GitHub. 12 January 2022.
- ^ "Aisamanra/Rrecutils". GitHub. 13 January 2022.
- ^ "GNU Recutils". www.gnu.org. Retrieved 3 January 2025.
External links
[edit]
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