Which Api..?

Question

Hello everyone, as a newbie in xml, I would like your help :)
I would like to create an application, that allows a user to create/modify/save an xml file that follows a specific w3c xml-schema,not dtd (although if it gets much easier with dtd i will probably use that in the end). The user should be able to see the tree structure of the xml and to be able to navigate through it [in one frame(left)] and fill in values to the fields that he wants(e.g. add in the xml that "david" is the 'author') [in a second frame(right)]. Ideally, this should run on a web server, so that the user can create/modify/save the xml by visiting a webpage.
The procedure to do so (the way i have it in my mind right now) is this:
1)somehow parse my xml-sxhema and create a tree(?) data structure (on the memory(?)) that contains all the empty fields
2)present this structure to the user
3)when the user clicks on an a tree item [left frame], that has fields that can be filled, then I must find out(how?) which are these fields and present them to the user, to fill them in[right frame].
I have been searching on the subject on the web the last few days, but got myself really confused. I am not sure which API to use e.g. JAXB, JAXP, DOM, JDOM, SAX etc.Since random access of the xml is needed, will I need to create java classes that manipulate the xml file or a simple parser will be fine?
Which one would you recommend me to use and why? Please enlighten me :)
Thanx in advance, your help is greatlly appreciated!
-Orestis

Answer 1

The Price_Request procedure in the QP_PREQ_PUB package is the pricing engine API that is available for public use. However, you need to prepare data before and for calling this API. Here is a proposed structure
Qp_Attr_Mapping_Pub.Build_Contexts
...here you build the various data records (E.g. LINE_TBL_TYPE, CONTROL_RECORD_TYPE etc..)
QP_PREQ_PUB.PRICE_REQUEST -- to compute the price
I suggest you look at the price_line and price_order apis that order management uses. While these are not public apis, they will give you a sense for how to call the pricing engine.
Hope this helps.
Thanks.
Kannan