[Seavox] CDI Library 3 (Sampling interval code)

[Keiran Millard]

Roy,

Firstly I agree with your point:

> that it could be considered to be using a vocabulary to 
> overcome limitations in a data model.

And that the vocabs are for discovery and that interegation of the data model will identify [precisely] which samplnig has been used.

Secondly I had an interesting chat with Andrew Woolf on a topic related to this for the CSML V2 Feature Types.  In CSML V2 the concept is introduced for 'ragged' sampling FT's, however this was primarily considered for 'ragged' sampling in space [distributed measurement sites] and not in time, which is the situation Michelle has, but also would be the case with moored instruments with different sampling bursts.

Best regards

Keiran
 

> -----Original Message-----
> From: seavox-bounces at biwebs1.nerc-liv.ac.uk 
> [mailto:seavox-bounces at biwebs1.nerc-liv.ac.uk] On Behalf Of Roy Lowry
> Sent: 18 December 2006 08:10
> To: seavox at biwebs1-2.nerc-liv.ac.uk; sdn-tech at seadatanet.org
> Subject: Re: [Seavox] CDI Library 3 (Sampling interval code)
> 
> Hello Michele,
> 
> Your e-mail just missed me.  I was in work Friday morning, 
> but not the afternoon so I have just got to look at what you 
> are saying, and what you are saying raises a number of 
> issues.  I will start by giving my views and then see if 
> there are any other viewpoints on the Tech or SeaVox lists - 
> apologies for cross-postings.
> 
> To me, the primary purpose of the CDI is for discovery 
> metadata not usage metadata.  It therefore has to provide the 
> user with information to decide whether the data described 
> are of use or not.  It is not meant to fully describe the 
> data in detail.  In the case you describe I can see two 
> possibilities.  One would be to use the existing code that 
> best describe the data (probably '7' in this case).  The 
> other would be to set up a new code for 'variable sampling'.  
> From the user's viewpoint I would find the approximate 
> approach useful, but the more accurate term useless as it 
> could cover anything from 1Hz burst sampling several times an 
> hour to the kind of scenario you describe with the sediment 
> trap. I am pretty sure that data simply labelled 'variable 
> sampling' would tend not to get forgotten in searches.
> 
> Another possible approach would be to start setting up new 
> set of codes to quantify various sampling patterns.  My 
> feelings on this are that we could end up with so many codes 
> that search becomes difficult.  My other worry about this is 
> that it could be considered to be using a vocabulary to 
> overcome limitations in a data model.  The CDI data model 
> specifies a one-to-one relationship between entity and 
> sampling interval.
> 
> So, my preference would not be to create an additional code, 
> but to use the 'best fit' existing code.  Any other opinions?
> 
> Cheers, Roy.  
> 
> >>> Michele FICHAUT <Michele.Fichaut at ifremer.fr> 12/15/2006 
> 11:12 am >>>
> Dear Roy,
> 
> I am working on the new export of the CDI and checcking the 
> compatibility with the libraries.
> IConcerning library 3 I would like to add a code for 
> specifica data that we add and for which the sampling 
> interval is not constant for the time serie duration :
> we have that for sediment traps for example where we can have 
> one week between the 2 first measuremnets and then one month 
> and then .....
> 
> Is it possible to do so?
> 
> Regards,
> 
> Michèle
> 
> -- 
>                                 _
>                               _| |_
>                               (o o)
> ___________________________oOO-( 
> )-OOo__________________________________
> Michele FICHAUT - IFREMER/BREST - SISMER - B.P. 70 - 29280 PLOUZANE
> TEL:(33)02.98.22.46.43/(33)02.98.22.49.16 (secr.) 
> FAX:(33)02.98.22.46.44
> Email: Michele.Fichaut at ifremer.fr  WWW : 
> http://www.ifremer.fr/sismer/ 
> ______________________________________________________________
> __________
> 
> 
> 
> 
> _______________________________________________
> Seavox mailing list
> Seavox at mailman.nerc-liv.ac.uk
> http://mailman.nerc-liv.ac.uk/mailman/listinfo/seavox
> 
> 
> This message has been scanned for viruses by MailControl - 
> www.mailcontrol.com
> 
> 
> 
> Clickhttps://www.mailcontrol.com/sr/BO4APwiYYFYW0EvCoh4jKnuup1
> MTAfXGHKGDmbhl6EomVo0HNEwwM76AkBzSpQrd4yxSElg35zhRpLjklX2duGQe
> XeAb0u8Z5W39zlBUXNALwtW21vxXBjCvAVnDTHhCmC12dEKlK+2C1q4guGgYI1
AQilrWNQh5AO0dRVnq1sLOPGtACtDK5jlzA4cgRHlg!> UibdCMRjSV6W8MrZK2PjaC8nK3p6uY3 to report this email as spam.
> 


**********************************************************************
HR Wallingford uses Faxes and Emails for confidential and 
legally privileged business communications.  They do not of
themselves create legal commitments.  Disclosure to parties 
other than addressees requires our specific consent.  We are
not liable for unauthorised disclosures nor reliance upon them.  
If you have received this message in error please advise us 
immediately and destroy all copies of it.
**********************************************************************