[tdwg-content] delimiter characters for concatenated IDs

Markus Döring m.doering at mac.com
Mon May 5 15:49:22 CEST 2014

Hi Gabi,
can you explain a little more what you are trying to do giving an example maybe?

It appears to me you are creating (globally) unique identifiers on the basis of various existing fields which is fine. But when you use the identifier to create resource relations they should be considered opaque and you should not need to parse out the underlying pieces again. So in that scenario the character used to concatenate the triplet does not really matter for the end user as long as its unique and points to some existing resource, indicated by the occurrenceID in case of occurrences or the materialSampleID for samples.


On 05 May 2014, at 15:24, Dröge, Gabriele <g.droege at BGBM.ORG> wrote:

> Hi everyone,
> I guess there might have been some discussions about proper delimiter characters in the past that I have missed.
> In several projects, first of all in GGBN (Global Genome Biodiversity Network, http://www.ggbn.org), there is a need for making a decision now. We need to reference between different records and databases and within Darwin Core we want to use the relatedResourceID to do so.
> During our GGBN workshop at TDWG last year we agreed on concatenating the traditional triple ID (Catalogue Number, Collection Code, Institution Code) and add further parameters if required too (e.g. GUID, access point). We have checked those parameters and can definitely not use a single character as delimiter.
> So my question to you is, if there are already some suggestions on using two characters together as delimiters. It would be great if we could find a solution more than one community could agree on.
> Otherwise I would like to open the discussion and suggest "\\", "||", "\|", "§|", "§§", or "\§".
> Best wishes,
> Gabi
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> Gabriele Droege
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