Hi Barry, I'm not sure I understand what you mean by "adding the xml to the tree". Does that mean you managed to get the FO tree objects built from the corresponding FO elements? The stuff in ElementMapping, the necessary FO tree classes, the makers? How far did you really get?
Anyway, I remembered that someone already started to work towards flow maps a couple of years ago and a quick search revealed this: http://markmail.org/message/ownlgu55sni7fy5z It seems this was never properly resolved but maybe this could help with your task. Anyway, building up the FO tree structure is probably the easy part in all this. When it gets to area production (i.e. the layout managers), it gets more complicated. You have not chosen an easy task (just to be honest). I haven't studied flow maps in detail, yet, so I'm not sure about all the details but I suspect this will have an impact on the page production level (i.e. PageSequenceLayoutManager). At the moment, there's just the region-body which drives page production with the static content from the side regions around it. From what I know of flow maps, you can have multiple flows on one page . What that means to the whole page breaking process, I can't tell at the moment. One part of your task is certainly to learn how the layout engine works: starting with the Knuth approach (info to be found on the FOP Wiki), continuing with stuff like page-position, marker implications, multi-column layout and stuff like that. Then, I hope Vincent will also speak up because this may need to be coordinated with him as he's working on improving page breaking. I don't know if he's already taken flow maps into the picture. I don't want to discourage you, just be prepared for a steep learning curve. It's great to see new blood taking up the challenge. Getting the FO tree right is certainly a good first step. It may make sense to work on this incrementally, i.e. post a first patch to update the FO tree and then go on to work on the layout engine. I don't expect any significant changes in and after the area tree at least. Good luck! I'll try to help where I can but lately, Vincent is certainly closer to all the layout stuff.  http://www.w3.org/TR/xsl11/#d0e7202 On 16.02.2009 18:57:56 Barry Whiting wrote: > Hi > > Please understand I'm not a main java developer but I have taken the > responsibility of fop in our workplace as I usually write the xsltfo. > > I am trying to implement flow maps inside and have so far found no > problems with adding the xml to the tree but that's where I get stuck. > > Could anybody point me in the right direction on how to know get these > Regions added to the renderer with the correct content for the flows > please? > > Kind regards > > Barry Jeremias Maerki