Next-Generation Data Access

re: Next-Generation Data Access

B_gd_n[ ]Sahlean — Thu, 04 Oct 2007 17:13:59 GMT

Multe din conceptele care stau la baza "MS - Entity Data Model" se regasesc in metoda (franceza) de proiectare a sistemelor informaţionale si informatice MERISE (care la randul ei se bazeaza pe Entity-Relationship Model partial + ...). Fara suparare, dar sunt lucruri invechite. Cineva poate spune ca nu este obligatoriu, ca tot ce este vechi sa fie perimat/expirat (ex. modelul relational, programarea obiectuala ... ). Tousi "Entity Data Model" intra in contradictie cu valul (moda ?!) prezent din dezvoltatea sistemelor informatice de gestiune, si anume paradigma obiectuala care consta in cresterea utilizarii limbajelor de programare obiectuale (vezi: Java, C#, VB.NET, VB 5/6 & multe altele). Entitatile nu sunt obiecte (din perspectiva abordarii obiectuale) pentru ca nu includ operatii. Un sistem informatic la modul simplist, intr-o viziune sistemica este compus din date + operatii. Cu alte cuvinte "Entity Data Model" reprezinta doar jumate din problema. Unde este cealanta jumatate ... adica operatiile ?

re: Next-Generation Data Access

xmldeveloper — Fri, 05 Oct 2007 07:30:51 GMT

EDM is an ORM. Even inside Microsoft there are disputes if EDM is or isn't neccessary.

In my opinion, at the end of the day - there would be a relational database :)

There are people that think otherwise. For example, Daniela Florescu (that had a great contribution to XQuery): "

My Outrageous Claim:

In 15-20 years from now: lnformation will stay only in XML (no more tuples, no more objects)

Imperative languages as we know them today (Java, C, C++, C#) will be gone

We will program with some extension of XQuery, or in any case a declarative dataflow/workflow language specially designed for XML processing, SOA, and for enabling universal information flow.

The sooner we go there the better."

"XQuery in Five Minutes" http://www.webservicessummit.com/Trends/XQuery_CIDR2005.htm

re: Next-Generation Data Access

B_gd_n[ ]Sahlean — Tue, 09 Oct 2007 11:16:33 GMT

The Glacial Methodology: A Data-Oriented Approach to Software. Development – Scott Ambler

http://www.ratio.co.uk/ov9pdf.pdf - Page 28