formats

GO Annotation File (GAF) Format 2.1

Annotation data is submitted to the GO Consortium in the form of gene association files, or GAFs. This guide lays out the format specifications for GAF 2.1; for the previous GAF 2.0 file syntax, please see the GAF 2.0 file format guide.

For the first GAF 1.0 file syntax, please see the GAF 1.0 file format guide.

Please see the information on the changes in GAF 2.1.

Gene Product Information (GPI) Format

Gene Product Information (GPI) format is used to submit gene and gene product information to the GO Consortium. Please note that the GPI companion file for annotation information uses the GPAD file format.

GPI format version

All annotation files must start with a single line denoting the file format. For GPI it is as follows:

!gpi-version: 1.2

Gene Product Association Data (GPAD) format

The GPAD file is an alternative means of exchanging annotations from the Gene Association File (GAF). The GPAD format is designed to be more normalized than GAF, and is intended to work in conjunction with a separate format for exchanging gene product information.

All annotation files must start with a single line denoting the file format. For GPAD it is as follows:

!gpa-version: 1.1

GO Annotation File Formats

This page documents the file formats used to store gene associations (annotations), data capturing the attributes of gene products using terms from the Gene Ontology. For more general information on annotation, please see the GO annotation guide.

GO Annotation File (GAF) Format 1.0

Annotation data is submitted to the GO Consortium in the form of gene association files, or GAFs. The following document lays out the format specification for GAF 1.0; for the newer GAF 2.0 file syntax, please see the GAF 2.0 file format guide.

More general information on annotation can be found in the GO annotation guide.

File Format Guide

GO Formats

The GO File Format Guide documents the structure and syntax of the files available on the GO website, to assist users who need to read, write parsers for, or create these files. The following file formats are documented separately:

GO Annotation File Format 2.0

Annotation data is submitted to the GO Consortium in the form of Gene Association Format, or GAFs. This guide lays out the format specifications for GAF 2.0; for the older GAF 1.0 file syntax, please see the GAF 1.0 file format guide.

Please see the information on the changes in GAF 2.0.

General information about annotation can be found in the GO annotation guide.

IC: Inferred by Curator

Updated September 22, 2011 

The IC evidence code is to be used for those cases where an annotation is not supported by any direct evidence, but can be reasonably inferred by a curator from other GO annotations, for which evidence is available.