anchor.diff:  * native and naturalised and doubtfully naturalised - because naturalised doesn't contain doubtfully naturalised
   * anything with "presumed extinct"
   
  +==== GBIF Distribution Extension to Darwin Core
  +
  +Niels Klazenga pointed out we need to support the http://rs.gbif.org/extension/gbif/1.0/distribution.xml[GBIF Distribution Extension to Darwin Core.]
  +
  +The relevant fields from that are:
  +
  +* http://rs.gbif.org/areas/[LocationId] - just map our regions to TDWG maybe? Better still store the geojson shape
  +* locality - Long form of region abbreviation e.g. New South Wales
  +* countryCode - AU
  +* http://rs.gbif.org/vocabulary/gbif/occurrence_status.xml[occurrenceStatus] ...
  +** present: `There is at least one well documented record of the taxons presence in the area.`
  +** common: `Subclass of present: Species observed frequently in most proper habitat.`
  +** rare: `Subclass of present: Species occurs regularly, but in small numbers. Requires careful searching of proper habitat.`
  +** irregular: `Subclass of present: May be common in certain years and entirely absent other years.`
  +** doubtful: `The taxon is scored as being present in the area but there is some doubt over the evidence. The doubt may
  +be of different kinds including taxonomic or geographic imprecision in the records.`
  +** absent: `There is evidence to document the absence of a taxon in the area. An extinct organism is absent while its
  +establishmentMeans is native.`
  +** excluded: `Subclass of absent: The organism is reported insome (gray) literature for a certain region, but is is
  +erroneous. Reason for exclusion could be a misidentification, an old report, a simple publishing mistake or any other or unknown reason.`
  +* http://rs.gbif.org/vocabulary/iucn/threat_status.xml[threatStatus] ...
  +** Extinct
  +** Extinct in the Wild
  +** Regionally Extinct - **APC current use of presumed extinct?** however this term uses "when there is no reasonable doubt that ..."
  +** Critically Endangered
  +** Endangered
  +** Vulnerable
  +** Near Threatened
  +** Least Concern
  +** Data Deficient
  +** Not Applicable
  +** Not Evaluated
  +* http://rs.gbif.org/vocabulary/gbif/establishment_means.xml[establishmentMeans] ...
  +** native: `A species that is a part of the balance of nature that has developed over hundreds or thousands of years in
  +a particular region or ecosystem. The word native should always be used with a geographic qualifier (for example, native to New England).`
  +** introduced: `A species introduced with human help (intentionally or accidentally) to a new place or new type of habitat
  +where it was not previously found. Not all non-native species are invasive. In fact, when many non-native species are
  +introduced to new places, they cannot reproduce or spread readily without continued human help (for example, many ornamental plants).`
  +** naturalised: `Subclass of introduced: The organism reproduces naturally and forms part of the local ecology.`
  +** invasive: `Subclass of introduced: The organism is having a deleterious impact on another organism, multiple organisms or the ecosystem as a whole.`
  +** managed: `Subclass of introduced: The organism maintains its presence through intentional cultivation or husbandry.`
  +** uncertain: `Origin of organism is uncertain`
  +* source: (APC would use CHAH ref?) `Source reference for this distribution record. Can be proper publication citation, a webpage URL, etc.`
  +* occurrenceRemarks: `Comments or notes about the distribution e.g. "Excluded because of misidentification"`
  +* http://rs.tdwg.org/dwc/terms/#datasetID[datasetID] - e.g. http://biodiversity.org.au/nsl/APC **note we don't have a dataset identifier**
  +
  +
   == Structure
   
   
  
positive.code: 
  We would ideally like to be able to have a permanent real time query for this data.
  
  === Observations
  
  ==== multiple concerns
  
negative.code: "naturalised and formerly naturalised"
  
  In Anna's diagram above, it is clear that there is a set of valid or Possible Character States (status). We could just
  have each possible state as a modifier i.e. have separate state for each combination, but that would make composition at
  higher taxa harder and searching harder e.g.
  
  composing: "native and naturalised" + "formerly naturalised" -> just "native and naturalised"
  
  