---
layout: rule
id: GORULE:0000018
title: "IPI annotations require a With/From entry"
type: report
fail_mode: soft
status: implemented
contact: "go-quality@lists.stanford.edu"
implementations: 
  - language: java
    source: https://github.com/owlcollab/owltools/
---
All IPI annotations should include a nucleotide/protein/chemical
identifier in the "With/From" column (column 8). From the [description
of IPI in the GO evidence code guide](http://wiki.geneontology.org/index.php/Inferred_from_Physical_Interaction_(IPI)):

Error report (number of errors) in [db_species]-report.html & owltools-check.txt (details).