Can't access "Ontology Associations and DB Cross References" files

[garrettjstevens]

In the section Ontology Associations and DB Cross References of the spec, it refers to two files hosted on ftp.geneontology.org: ftp://ftp.geneontology.org/pub/go/doc/GO.xrf_abbs and ftp://ftp.geneontology.org/pub/go/doc/GO.xrf_abbs_spec. I am not able to access these files, or anything on ftp.geneontology.org. Are there updated locations for those?

[srynobio]

These are not sites hosted by SO. Let me look into updating the ftp addresses.

[corneliusroemer]

I came here to open this, then saw there was a duplicate.

I have no clue how to use ftp - it doesn't seem to work. Would be great if we could also have an http version for easier reference and user friendliness.