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Re: [xml-dev] XML aggregation question?

peter murray-rust wrote:
> At 12:26 27/08/2006, Robert Koberg wrote:
>> Hi,
> This is very useful and it's good that there are members of XML-DEV who 
> have had experience.

Cool. I would hope any others would speak up. I claim no final 
experience on the matter :)

>> On eXist:
>> the last time I tried eXist, while testing by adding/deleting 
>> documents/nodes and frequently restarting the (tomcat) webapp that 
>> eXist was embedded in, somehow (???) caused thousands of 
>> unidentifiable fragments to be created and added to the DB. Perhaps 
>> because it was trying to save some kind of context/session info - I 
>> don't know. It was discussed on the list
> I assume the eXist list, not here


>> For your situation eXist and XMLDB are both open and free (as in 
>> price). For someone who does not wish to open their source, eXist is 
>> the only one that is free (as in price). I don't mind paying for 
>> something, but XML databases seem to be more of a 'cross you fingers 
>> and close your eyes' kind of thing. Tamino just seems way to high 
>> priced - it seems like alot of money goes into their salesforce. XMLDB 
>> just pissed me off, but still too high priced.
> The string "XMLDB" is causing problems, I think. I have found:


Sorry. I remembered 'XML' and and 'DB' in the Sleepycat product name and 
misplaced them.

I believe this is the product we are talking about, correct?


(for some reason I remember the name differently...)

> This is very closely linked to SleepyCat so I begin to understand. It 
> seems there may be an unmaintained, potentially out-of-date, engine on 
> SF which just about meets the letter of the Open Source license, but is 
> of little use and which encourages people to buy a commercial product.

No. Sleepycat's offering is Open Source and free (as in price) for 
people who produce open source products.

Here is their license page:


You can always call them to verify, which is what I did. To me, they 
said just open up your app and you don't have to pay, otherwise it will 
cost you -- even though I wasn't distributing anything (in my 
understanding of the word).

Again, you should be fine -- IANAL :)
> ...
> I may have confused these various databases in my mails - the names are 
> sufficiently similar
>> So I have been sticking with the filesystem,
> Yes - I am a great believer in the filesystem as a simple database engine.
>> Apache's Lucene for indexing
> Yes
>>  and CVS or Subversion for version control.
> Yes

 From the code point of view, it works so nicely. Easy to develop on a 
local machine just by doing a server commit and local update. Easy to 
change on the server by doing a local commit and a server update (and 
probably an Ant build). Same for content/metadata if necessary to change 
in different locations -- just need to run a lucene update to keep the 
UI experience in sync.

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