Re: [Fwd: filesystem support for XML storage and querying]

Re: [Fwd: filesystem support for XML storage and querying]

[Hubert Chan]

>>>>> "Hans" == Hans Reiser <reiser@namesys.com> writes:

Hans> This was a good paper.:)

Thank you. :)

Hans> I don't understand the notion of ids, what motivates them, etc.

They are used in XML query engines for such things as removing duplicate
results.  (Although, I suppose inode number, or something similar, would
work just as well for this.)

Also, since XML nodes don't have names, we need to assign some sort of
ID so that they can be referenced in some way.  (e.g. if you have a
DocBook document with several chapters, you have to be able to tell the
filesystem which chapter you want to edit/remove/etc.)  Assigning each
node a persistent ID seems to be the simplest way to do things.

Hans> ReiserFS originally intended to use unique ids and then we
Hans> realized that keys were better.

I'm not familiar with what you mean by keys vs. ids, but it is possible
that using keys would be better.


As I said before, that paper is just a proposal, and I may or may not
actually implement it.  So unless I specifically re-claim it, that
topic is up for grabs for anyone who's interested.

-- 
Hubert Chan <hubert@uhoreg.ca> - http://www.uhoreg.ca/
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[Fwd: filesystem support for XML storage and querying]

[Hans Reiser]

This was a good paper.:)

I don't understand the notion of ids, what motivates them, etc.

ReiserFS originally intended to use unique ids and then we realized that 
keys were better.

Also, you'll want to understand carefully our inheritance architecture, 
which will be easier to understand once it is fully implemented.;-)

I enjoyed the paper, best,

Hans

>As I had mentioned earlier, for a course that I took last term, I had
>to write a research proposal, which I chose to do on filesystems and
>XML.  Here's a link to the proposal:
>
>http://www.cs.uwaterloo.ca/~hy3chan/cs741project.ps
>
>As I mentioned, real research may or may not come out of this, but I
>thought that it might be of interest to some people anyways.
>
>I got a good mark on the proposal, so I suppose I'm not completely out
>to lunch on the subject.  (It was a course on "Non-traditional
>databases", by the way.)
>
>  
>


-- 
Hans