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From Pei Chen <pei.c...@wiredinformatics.com>
Subject Re: Offline access
Date Mon, 16 May 2016 15:26:02 GMT
Having a hosted web site which hosts UMLS resources and checks for a license before downloading
locally(via the NLM/UMLS license validation web service) is indeed the norm and a more common
way.  (YTEX originally and UMLS itself does this when one downloads their resources.)  The
responsibility for any UMLS license adherence afterwards is essentially done by the one downloading
it since the check is done at that time.  The online/upon initialization license check/bundled
solution for cTAKES was really done for convenience to end users and historical reasons. 
It just boils down to who wants to build, manage, maintain, host such a site that distributes
and ensure the license check before downloading for these specially formatted resources.


> On May 16, 2016, at 9:12 AM, Finan, Sean <Sean.Finan@childrens.harvard.edu> wrote:
> The agreement that the ctakes core group was able to achieve with the NLM (distributor
of UMLS) was that ctakes would check a user's access rights upon every use of any database
derived from the UMLS.  The reason for this was that the NLM did not want one valid UMLS user
to download the database and then distribute it for use by unaccredited third parties.  We
have stuck to that agreement.  Upon every initial load of either of the distributed ctakes
dictionary modules the user's entered password is checked online with the NLM user registry.
> I think that a great compromise would be if somebody could create a "remote checkout"
tool, something that checks-out a virtual license for use while you are on the road.  Maybe
coordinate with the NLM on getting such a thing approved.  As ctakes is open source software
you could start toying with such a client first.  To start, delegate to JdbcRareWordDictionary
as does the UmlsJdbcRareWordDictionary, and delegate to JdbcConceptFactory as does the UmlsJdbcConceptFactory
(for the -fast module).  Then point to the new trial "remote checkout" classes in your .xml
setup file (the default being cTakesHsql.xml).  However, do NOT use these classes directly
or in any production scenario as that would not abide by our agreement with the NLM.  Do not
even check them into sandbox without us getting a new agreement to use such a system with
the NLM.  I must emphasize that publicly doing so could cause us to lose our privileges to
distribute a default dictionary.  You would still be able to download your own UMLS database
and create your own dictionary for use with ctakes, but not every user can do that.  And when
creating your client code favor composition over inheritance as the remote checkout client
should not have IS-A, not that I can enforce anything that you do.
> I repeat, NEVER use the JdbcRareWordDictionary and/or JdbcConceptFactory directly unless
you are pointing to a database that was not created using the UMLS as a source.
> Sean
> -----Original Message-----
> From: Geise, Brandon D. [mailto:bdgeise@geisinger.edu]
> Sent: Monday, May 16, 2016 8:01 AM
> To: dev@ctakes.apache.org
> Subject: RE: Offline access
> I haven't tried it and is a guess based on reading the code, but you might be able to
change the dictionary implementation name in the xml file from UmlsJdbcRareWordDictionary
to ConceptFactory, since Umls factory implements from ConceptFactory.
> -----Original Message-----
> From: Miller, Timothy [mailto:Timothy.Miller@childrens.harvard.edu]
> Sent: Saturday, May 14, 2016 2:28 PM
> To: dev@ctakes.apache.org
> Subject: Re: Offline access
> Well, before we had online verification ctakes required downloading umls, extracting
the right subset, and building a database for the dictionary tool. You can still do that -
it is often necessary for use cases that our default dictionary doesn't have coverage, and
while I'm not sure the state of documentation there have been several threads on the list
about it. I think if you do it this way you can skip the UMLS verification step (though I
don't remember exactly how that works) because you will have been verified at download time.
> Can Sean or someone verify that this is true? If he builds his own dictionary (with the
same subsets) can he skip the online verification?
> Thanks
> Tim
> ________________________________________
> From: John Travis Green <john.travis.green@gmail.com>
> Sent: Saturday, May 14, 2016 10:12 AM
> To: dev@ctakes.apache.org
> Subject: Offline access
> I have a dod use case that requires offline umls verification. Anyone accomplish this
yet? I recall some chatter awhile back but initial flirtations with google were unsuccessful.
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