This page contains a selection of guidelines to keep in mind when editing data. Their intention is to maintain the quality of the data we collect.
Sources
We don't just want to collect a bunch of information which nobody knows if they can trust it. Instead, all information added to railwayhistory.org should carry proper attribution, i.e., the sources you got the information from should be noted.
There are two things available for this purpose. The object type "source" is used for any objects describing a source document. Thus, all your sources should be added as objects to the database.
When you then add information based on the source, you add the "source" attribute to it, which contains a (space separated) list of object ids for all the source objects the information is derived from.
Proper attribution means that each event carries exactly the sources it was derived from. If you have information from one event that has been collected from two different sources, split it up into two events.