wiki-archive/twiki/data/SDD/Primer/DescriptiveTerminology.txt

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---++SDD Part 0: Introduction and Primer to the SDD Standard
---+++4.7 Descriptive terminology.
The descriptive terminology element in SDD contains entries for a number of loosely related groups placed in three subsidiary elements; [[DescriptiveConcepts][<DescriptiveConcepts>]], [[SddCharacters][<Characters>]] and [[CharacterHierarchies][<CharacterTrees>]].
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SDD [[DescriptiveConcepts][<DescriptiveConcepts>]] express basic terminological concepts of a more general concept than "characters" (structural hierarchy, property hierarchy, methods).
[[SddCharacters][<Characters>]] and their states are fundamental elements used in SDD to describe a taxon, specimen or other entity.
[[CharacterHierarchies][<CharacterTrees>]] define operational hierarchies for listing characters in a character definition report, in interactive keys, or in natural language reports
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