[Wikitech-l] How to proceed from save page/preview page

I have a few doubts about the flow of code once the user clicks save/preview/show diff buttons. I am sorry for posting this again but am really stuck at this :( I have made changes to our locally installed wiki 1)Added a reference button in the edit toolbar which when clicked pulls up a pop up where the user can enter reference information. Once user cliks submit in this form the information gets entered to the reference table in wikidb. What i need to understand is, how should i proceed when user clicks eithr the save/preview button. I have a slight idea that only after user clicks save page, information should get entered to the referencelinks table which is a replica of the imagelinks table. Also I tried looking into the Article.php code as said by Tim, but i still cant figure out how i should proceed. I cannot figure out at what point and where in the code i can add information to the referencelinks table. Or should this be done when user clicks the preview page button? I would really appreciate any help. Amruta -- Amruta