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Date: Wed, 2 Jul 2008 09:39:14 +0000 (GMT)
From: paola lorusso <thopus1@yahoo.it>
Reply-To: thopus1@yahoo.it
Subject: impedance mismatch, XML-native db, data model
To: couchdb-user@incubator.apache.org
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Hi,=20
I am an Italian student, Paola Lorusso.
I am=C2=A0very interested about Couchdb which=C2=A0is the main=C2=A0topic o=
f my
thesis and I would like you to give me some information focusing on=C2=A0th=
e
issues i 'm going to consider;
In my thesis, I am looking into the=C2=A0matter of Impedance mismatch
occurring in web application development,=C2=A0especially when you use a
relational database.
>From scientific papers I got information about the uncapability of
object databases and XML-native databases to solve the problem I dealt
above.
Since I look into the main features of Couchdb I mean this database can era=
se the problem.
In fact, for example, it allows the query language=C2=A0to be=C2=A0the same=
 of programming language.
Please, would you let me know if my statement is correct?
=C2=A0
Plus, I read CouchDb is schema-free with a flat address space=C2=A0where ea=
ch document has an unique ID.
So I would ask you, how can I specify that two documents are associated=C2=
=A0each other?
For example: If I consider a blog, there is a post which is commented and i=
t has several comments.
How can=C2=A0I structure a comment document? Should this document have
the ID of post document it comments, as similar to foreign key=C2=A0 in a
relational model?=C2=A0 Is this correct?If I have an application with docum=
ents tightly correlated, what kind of advantages can I have using schema-fr=
ee database?=20
It means there is not a data model?

=C2=A0
The last question=C2=A0 I am asking you is about the differences between
Couchdb, defined also as document oriented database, and the XML native
database, also called document centric database.
Do you think there is a linguistic and terminological=C2=A0difference
between them? Do you think Couchdb is better than XML-native database?
I know, I asked a lot of questions,however, I hope you can answer
me. Now, my aim is=C2=A0to understand better these matters. In this way I
should contribute=C2=A0to solve problems to whom=C2=A0are interested in thi=
s
field.
=C2=A0
greetings
=C2=A0
Paola Lorusso =0A=0A=0A      Hai un indirizzo email difficile da ricordare?=
=0AScegli quello che hai sempre desiderato su Yahoo! Mail=0Ahttp://it.docs.=
yahoo.com/nuovo_indirizzo.html
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