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#### 5.1.1 Input Formats

Some of the tools in this package ask you to specify the format of input tables using the `ifmt` (or a similarly named) parameter. For some file formats (e.g. FITS, VOTable, CDF), the format can be automatically determined by looking at the file content, regardless of filename; for others (e.g. CSV files with a "`.csv`" extension), STILTS may be able to use the filename as a hint to guess the format (the details of these rules are given in the format-specific subsections below). Otherwise, you have to supply the format using the `ifmt` parameter. It is always safe to specify the format explicitly; this will be slightly more efficient than auto-determination, and may lead to more helpful error messages in the case that the table can't be read correctly.

The available input formats are described in the following subsections. It is also possible to add new formats at runtime using the `startable.readers` system property, or by setting the format to the classname of a `uk.ac.starlink.table.TableBuilder` class.

- 5.1.1.1 `fits`
- 5.1.1.2 `colfits`
- 5.1.1.3 `votable`
- 5.1.1.4 `cdf`
- 5.1.1.5 `csv`
- 5.1.1.6 `ecsv`
- 5.1.1.7 `ascii`
- 5.1.1.8 `ipac`
- 5.1.1.9 `feather`
- 5.1.1.10 `gbin`
- 5.1.1.11 `tst`
- 5.1.1.12 `wdc`

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STILTS - Starlink Tables Infrastructure Library Tool Set
Starlink User Note256
STILTS web page: http://www.starlink.ac.uk/stilts/
Author email: m.b.taylor@bristol.ac.uk
Mailing list: topcat-user@jiscmail.ac.uk