WhatPub.com is the CAMRA central online guide into which the the various pub databases (inc. HOPS) will export their data to finally give a vital resource for pub goers - a CAMRA driven pub guide to rival Pubs Galore, Beer In the Evening etc.
The process is relatively simple:
It is hoped that in future, this process can be automated.
You may encounter errors in your data. This is because the validation checks carried out by www.whatpub.com are more rigid in some areas than HOPS. I'm afraid you will have to correct these in HOPS and then do the export/import again. If you have queries re: the process, please post a message on the HOPS Yahoo group.
Whilst HOPS is able to generate PDS format files for use in WhatPub, there are a few areas where special formatting is needed:
Include the distance in the notes field wrapped in square brackets, e.g. for Near railway station: Macclesfield  means 50m from Macclesfield station. The distance is always measured in metres. Distances can be specified for Near railway station, Camping, On bus route and Near underground or tram station.
This is CAMRA standard that HOPS exports the data to. It's currently at version 1.5 and the specification can be downloaded here.