hierarchical database for repository

[Simon St.Laurent]

First, the suggestions I got privately:

* pse-pro - An object database in Java
* Meta-kit (http://www.equi4.com/metakit/), a C++ database engine

Now, what I'm really looking for and more of what I hope to do with it:

I'm trying to build an extremely lightweight repository for XML.
Basically, it'll take SAX events going in, store the data hierarchically
(and in the right place in the DB), and then be able to spit SAX events
back out from any given location.  Management and searching are useful
features in the long run, but for right now I'm just looking for something
that will let me store lots of nodes persistently without a lot of
overhead, and without restrictions on length.

Everything will be text - BLOB storage is unimportant.  I don't want to be
tied to a particular object representation of the information at this
point, making the DOM a lot more than I need at this point.  While an
object database might be okay, it's not the 'object' part I care about -
it's simply being able to store hierarchically linked nodes persistently.
(Being able to change the links between them occasionally is also
important.)  Multi-user access is not presently important.  The simpler the
API, the better, at this point.

I'm sort of going back to the late 60's and early 70's, before those
relational people gave us all kinds of strange and highly useful ideas
about structuring data.

Fortunately, this isn't a commercial project, so you're all quite welcome
to take any of these ideas and run with them.  If I don't find anything
that quite meets this level of simplicity, I suppose I'll roll my own.

Thanks!

Simon St.Laurent
XML Elements of Style / XML: A Primer, 2nd Ed.
Building XML Applications
Inside XML DTDs: Scientific and Technical
Cookies / Sharing Bandwidth
http://www.simonstl.com

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