You are right as of today, where DAS can only create SDO. I was wondering if DAS could be extended to create other non-SDO types.
- Luciano On 10/19/06, Geoffrey Winn <[EMAIL PROTECTED]> wrote:
Thanks for that. I'm clear about both of those and I'll discuss them with the 2 universities. I took another look at the third suggestion ... *DAS and non-SDO data types* Currently, Tuscany DAS only generate static or dynamic Service Data Objects. This project consist in generating different object types as a result of a DAS command. This project would include extending DAS to understand what types should be generated, investigating and solving problems like how to handle change summaries, etc.This could be applied not only for the current DAS RDB implementation, but in conjunction with other implementations like XML DAS. I don't follow this one at all (this may be because I mostly work with SDO for C++ which doesn't have a static interface). As I understand it, static and dynamic types are the only choices, so I'm not sure what you mean by "generating different object types as a result of a DAS command." Apologies for being a bit slow, on the other hand, if I don't understand then maybe potenial students won't either. Thanks and regards, Geoff. On 18/10/06, Luciano Resende <[EMAIL PROTECTED]> wrote: > > C++ DAS would be a DAS implementation in C++. When I said SDOHelper, I > should have said XMLHelper. > > As for XML DAS, you got it right, and as far as I know we don't have > anyone > looking into that as of now, at least in the Java side. > > > - Luciano > > On 10/18/06, Geoffrey Winn <[EMAIL PROTECTED]> wrote: > > > > On 18/10/06, Luciano Resende <[EMAIL PROTECTED]> wrote: > > > > > > Hi Geoff > > > > > > I have started creating some project descriptions for the DAS ideas > > > listed on the referenced wiki page. Please find my draft at : > > > > > > > > > http://wiki.apache.org/ws/Tuscany/TuscanyJava/DAS_Java_Overview/DAS_Subprojects > > > > > > Please let me know if you want any specific type of contents to > help > > > you > > > sell the ideas to the university/students. > > > > > > - Luciano Resende > > > > > > > > Looking at the first item > > * > > * *C++ DAS* > > > > Today, Tuscany C++ SDO work in conjunction with SDOHelper to map > back-end > > data representation to Service Data Objects. There is a need for a C++ > DAS > > implementation that would interop with the C++ SDO and mediate between > the > > SDO and the back-end store. > > Could explain a little more about this? What is the SDOHelper? I'm not > > aware > > that SDO for C++ has an SDOHelper. > > > > And for the second item > > > > *XML DAS* > > > > Currently, Tuscany DAS only support RDB back-ends, altough the idea is > > that > > DAS could access and mediate data trough various backends > representations, > > XML being one of them. This project consists in designing the DAS > > implementation over XML, how the commands would be structured (e.gusing > > XQuery, XPath, etc) and also contribute important feedback to a possible > > DAS > > spec. > > I'd like to check that I understand this correctly. SDO already has an > > XMLHelper that will read an XML document and generate a data graph. I > > think > > you mean a DAS that will selectively read fragments of an XML document > and > > generate data objects corresponding to those fragments. Is that > somewhere > > near? If so, I think that's the sort of thing that would work well as a > > student project. > > > > Thanks and regards, > > > > Geoff. > > > > > >
