---
layout: rule
id: GORULE:0000031
title: "Annotation relations are replaced when not provided by source"
type: repair
fail_mode: hard
status: implemented
contact: "go-quality@lists.stanford.edu"
implementations:
  - language: python
    source: https://github.com/biolink/ontobio/blob/master/ontobio/io/assocparser.py#L390
---
In GAFs, relation is overloaded into qualifier.
If no explicit non-NOT qualifier is specified, use a default based on GPI specifications:
For Cellular Component: relation = 'part_of'
For Biological Process: relation = 'involved_in'
For Molecular Function: relation = 'enables'

##This seems to be only exported in GPAD for now.