[Biopython-dev] [Wg-phyloinformatics] GSoC Weekly Update 9: PhyloXML for Biopython
Christian M Zmasek
czmasek at burnham.org
Tue Jul 21 17:51:03 UTC 2009
Hi, Hilmar:
Hilmar Lapp wrote:
> A clade is a subtree of a tree, i.e., a node and all its descendent
> nodes (and the branches that connect them). Or more generally for an
> unrooted tree, it is any group of nodes (and branches connecting them)
> that can be completely separated from the rest of the tree by severing
> a single branch.
>
> -hilmar
Actually, that is how clade is being used.
Like so:
<phylogeny rooted="true">
<clade>
<clade branch_length="0.06">
<clade branch_length="0.102">
<name>A</name>
</clade>
<clade branch_length="0.23">
<name>B</name>
</clade>
</clade>
<clade branch_length="0.4">
<name>C</name>
</clade>
</clade>
</phylogeny>
The difference is, a clade can contain other clades, wheres as node cannot.
Chris
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