Search Mailing List Archives

Limit search to: Subject & Body Subject Author
Sort by: Reverse Sort
Limit to: All This Week Last Week This Month Last Month
Select Date Range     through    

[protege-discussion] Undelivered Mail Returned to Sender

Tania Tudorache tudorache at
Thu Sep 7 17:15:54 PDT 2006


I did receive your email. Indeed this is a problem, that you have to 
first load the OWL file in memory and then to export it to an OWL 
database. We are looking at ways on how to do a streaming writing to the 
database directly.

Until then, you need to increase the heap size, if you need to 
accomodate very large ontologies.


Congmin min wrote:

> Hi, Tania:
>       I am attaching three files for your testing:
>       The .tar.gz contains three owl files I generated. Both are very 
> simple owl files, only containing one class and a number of instances 
> of this class. This is just for testing purpose. And three files are 
> quite small: about 8 MB, 5 MB and 3 MB.
>      test.200000.owl: one 'Concept' class and 120000 instances of it
>       test.120000.owl: one 'Concept' class and 120000 instances of it
>       test.50000.owl: one 'Concept' class and 50000 instances of it
>    On my computer I can load test.50000.owl within 2 minutes, 
> test.120000 within 5 minutes, but can't load test.200000.owl (I waited 
> for 30 minutes). My computer has about 1GB memory.
>    If your computer is more powerful than mine, you can use the little 
> to generate an ontology with more than 200000 instances of a 
> class, (you only need to pass a 'number'  you want at the command line 
> when executing 'a.out' ) and then test agin.
>    If I am not doing something wrong, it looks like Protege doen't 
> allow a class to have a certain number of instances; otherwise, it 
> would have difficluty in loading the file. This is true to database 
> option.
>  If you received this email, please kindly let me know.
> Thank you
> On 9/7/06, *Mail Delivery System* < MAILER-DAEMON at 
> <mailto:MAILER-DAEMON at>> wrote:
>     This is the Postfix program at host
>     <>.
>     I'm sorry to have to inform you that your message could not
>     be delivered to one or more recipients. It's attached below.
>     For further assistance, please send mail to <postmaster>
>     If you do so, please include this problem report. You can
>     delete your own text from the attached returned message.
>                             The Postfix program
>     <protege-discussion at
>     <mailto:protege-discussion at>>: mail forwarding
>     loop for
>          protege-discussion at
>     <mailto:protege-discussion at>
>     Final-Recipient: rfc822; protege-discussion at
>     <mailto:protege-discussion at>
>     Action: failed
>     Status: 5.0.0
>     Diagnostic-Code: X-Postfix; mail forwarding loop for
>         protege-discussion at
>     <mailto:protege-discussion at>
>     ---------- Forwarded message ----------
>     From: "Congmin min" < marlonmin at
>     <mailto:marlonmin at>>
>     To: protege-discussion at lists.Stanford.EDU
>     <mailto:protege-discussion at lists.Stanford.EDU>
>     Date: Wed, 6 Sep 2006 14:54:26 -0500
>     Subject: [protege-discussion] Number of Instances of one class can
>     not be large??
>     I am doing some experiments and seems to find another BUG. To
>     officially
>     report that, I want to ask:
>     Is there any restrictions on the number of instances of one class? The
>     problem I have now is that once the number of instances of one
>     class exceeds
>     a certain number, Protege failed to load the OWL File, although
>     the file is
>     pretty small, just several MBs. It is not a memory issue.
>     Thanks for any info.
>     _______________________________________________
>     protege-discussion mailing list
>     protege-discussion at
>     <mailto:protege-discussion at>
>     <>

More information about the protege-discussion mailing list