A system for representing bird taxonomy |  |
A system for representing bird taxonomy | |
The rankSet element is a simple
container for rank elements,
each of which defines one taxonomic rank. The ranks must
be in descending order of size, starting with the rank
of the root taxon of the classification.
rankSet = element rankSet { rank+ }
rank = element rank
{ attribute code { text },
attribute optional { '1' }?,
attribute digits { xsd:string { pattern='[0-3]' } },
attribute depth { xsd:nonNegativeInteger },
text
}
code
This is the rank code as described under Section 5.1, “The ranks file”. Examples:
“o” for
order, “-f”
for subfamily.
optional
Attribute optional='1'
means that this rank may not appear in some parts
of the classification.
digits
Specifies the number of digits for this rank in the taxonomic key. See Section 7.1.1, “Taxonomic key numbers”.
depth
The first or root rank will have depth='0', and each successively
deeper rank will have a value that is one greater
than its predecessor. This value can be used to
answer the question, which rank is deeper?
text
The textual content of the rank element is the name of the rank,
e.g., “Genus”.
Here's an example of the rank
element for subfamily rank:
<rank code='-f' optional='1' digits='1' depth='3'>
Subfamily
</rank>