[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: funny parser
Robin Berjon wrote: > Steven J. DeRose wrote: > >> How about putting an ID on every changeable node, and then sending >> something like: >> >> <replace target='someID'> >> ...new XML for that node... >> </replace> > > Yes, that or an XPath should work quite well. It's routinely done in a > variety of situations. You may wish to look at XUpdate for instance > (assuming you want to reuse an existing piece of technology). I just took a look at XUpdate. And it seems to be OK, but I need some funny callbacks on the client side. And they are very important for my project. And I did not find them in XUpdate. I got my big XML document on the Client side. I can somehow identify each element and each attribute in my big XML document somehow. So I got some kind of XML pointer to a specific attribute of a specific element. The Client API must provide function like this: install_xml_callback(pointer_to_XML_attribute, pointer_to_callback_function) Whenever this attribute has changed the callback_function has to be called with at least the following parameters: callback_function(pointer_to_XML_attribute,new_value_of_the_attribute) "has changed" is of course equivalent to has been received from the server. ******** Does anyone know if this works with XUpdate, or does anyone know if there is any system that can give me these callbacks? ********** The reason why I need them I that I want to display the XML document (or rather parts of it) in a graphical user interface. And I need to update the GUI whenever the XML document changes. Otherwise I would have to use some polling mechanism, which eats CPU time. >> Can you be certain that all change requests will be received, and in >> the order they were sent? If not, the problem gets much messier; but >> probably you can ensure that somehow. > Yes I can. At least I think so if I simply connect Client and server via a TCP/IP connection. Cheers Dirk
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