Re: LSID lookup details: help? [was: All about the LSID URI/URN]

Based on some quick research Steve Evanchik did at the lab here...



"The domain rcsb.org periodically doesn't resolve correctly on my machine:

$ nslookup.exe rcsb.org
Server:  somdns01.srv.ibm.com
Address:  9.0.5.1

Name:    rcsb.org

and from my Linux machine:

evanchsa@gemini:~> nslookup rcsb.org
Server:         9.0.5.1
Address:        9.0.5.1#53

Non-authoritative answer:
*** Can't find rcsb.org: No answer


However, I can get to it via the web at http://rcsb.org which is odd.

Anyway, it looks like beyond that the SRV record for rcsb.org does not 
exist:

evanchsa@gemini:~> host -t srv _lsid._tcp.rcsb.org
Host _lsid._tcp.rcsb.org not found: 3(NXDOMAIN)

So it appears that the LSID authority rcsb.org is no longer operational."


Ben Szekely
IBM Software Engineer
Advanced Internet Technology, Cambridge, MA
bhszekel@us.ibm.com

public-semweb-lifesci-request@w3.org wrote on 07/31/2006 01:34:31 PM:

> 
> In today's call, I learned a bit about how LSID lookup
> works:
> 
>  (1) try to find an SRV record using the domain in the LSID
>  (2) fall back to a DDDS lookup and NAPTR and such
> 
> Option (2) depends on some NAPTR stuff in the "arpa" parts
> of DNS space that OMG is expected to install but hasn't
> gotten around to, largely for lack of urgent need, I gather.
> 
> I'm trying to verify my understanding from some code.
> I found some perl code[2], and I got it installed
> with "All tests successful." But when I run it,
> using an example from the LSID spec[1]:
> 
>   URN:LSID:rcsb.org:PDB:1D4X:22
> 
> I get "Unable to resolve authority to SRV record: NXDOMAIN".
> 
> 
> Any clues? A full trace is below:
> 
> > ~/src/lsid-perl-1.1.4$ perl examples/client/lsid_client.pl
> > URN:LSID:rcsb.org:PDB:1D4X:22
> Client settings:
> Cleaning cache:
>         no
> 
> LSID Given:
>         URN:LSID:rcsb.org:PDB:1D4X:22
> 
> Canonicalized LSID:
>         urn:lsid:rcsb.org:PDB:1D4X:22
> 
> Unable to resolve authority.
>  -> Unable to resolve authority to SRV record: NXDOMAIN
> 
> Stack trace at LS/Locator.pm line 230
>         LS::Locator::resolveAuthority('LS::Locator=HASH(0x824e900)',
> 'LS::ID=SCALAR(0x823f7cc)') called at LS/Client/BasicResolver.pm line
> 138
> 
> LS::Client::BasicResolver::resolve('LS::Client::
> BasicResolver=HASH(0x824e4b0)', 'lsid', 'LS::ID=SCALAR(0x823f7cc)') 
> called at examples/client/lsid_client.pl line 165
>         main::resolveLSID('LS::ID=SCALAR(0x823f7cc)', 'undef', 'undef')
> called at examples/client/lsid_client.pl line 125
> 
> 
> Stack trace at LS/Client/BasicResolver.pm line 143
> 
> LS::Client::BasicResolver::resolve('LS::Client::
> BasicResolver=HASH(0x824e4b0)', 'lsid', 'LS::ID=SCALAR(0x823f7cc)') 
> called at examples/client/lsid_client.pl line 165
>         main::resolveLSID('LS::ID=SCALAR(0x823f7cc)', 'undef', 'undef')
> called at examples/client/lsid_client.pl line 125
> 
> > 
> [1] http://www.omg.org/cgi-bin/doc?dtc/04-05-01
> [2] 
> 
http://easynews.dl.sourceforge.net/sourceforge/lsid/lsid-perl-1.1.4.tar.gz
>  <- http://lsid.sourceforge.net/
> 
> -- 
> Dan Connolly, W3C http://www.w3.org/People/Connolly/
> D3C2 887B 0F92 6005 C541  0875 0F91 96DE 6E52 C29E
> 
>