anchor.diff:  "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
  -each possible state a modifier i.e. have separate state for each combination, but that would make composition at higher
  -taxa harder and searching harder e.g.
  +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"
   
  
positive.code: 
  We would ideally like to be able to have a permanent real time query for this data.
  
  === Observations
  
  ==== multiple concerns
  
negative.code: * 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
  
  
  