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Revision 5311

schemas/vegbien.sql: taxonconcept: Added comment with the definition of a taxon: "a group of one (or more) populations of organism(s), which a taxonomist adjudges to be a unit" (http://en.wikipedia.org/wiki/Taxon). This is useful in clarifying that our taxon concepts are intended to serve a similar purpose, by storing one person's defined taxon.

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schemas/vegbien.sql
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COMMENT ON TABLE taxonconcept IS 'A taxon concept defined by an entity. Can be at any level in the taxonomic hierarchy. Can be either verbatim or accepted.
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"A taxon (plural: taxa) is a group of one (or more) populations of organism(s), which a taxonomist adjudges to be a unit" (http://en.wikipedia.org/wiki/Taxon)
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Note that taxonname stores only one rank (e.g. family) of the full taxonomic name. The higher-level ranks are stored in the taxon concept''s chain of parent_id ancestors.
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To include a taxon name at a rank with no explicit column, create a parent taxonconcept for it and point to it using parent_id. To include multiple such names, chain the taxonconcepts together using parent_id. Note that lower-level taxa should point to higher-level taxa.

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