Using xml files for a web project.

@jreklund ... XPath is your sorting & searching friend, as well as XSLT serverside! SimpleXML has xpath capabilities. I haven't played with XSLT inside PHP, so can't comment on how appropriate it is.

So there are a order by functionality. Who knew! Personally I will stick to relation based database. But if it's static pages, made with markdown like you said. It could be a valid option for sure.