<?xml version="1.0" standalone="yes"?>
<controlled_vocabulary db_table="Species" db_column="cell_structure" cv_table="SPC_CellStructure">
  <comment type="definition">This table provides the restricted vocabulary for the column cell_structure in the table Species and provides a way to quickly separate categories relevant to single and multicellular species and eukaryotic or prokaryotic or viral species.   
</comment>
<term name="unicellular_eubacteria"
        description="organisms that are single celled and eubacteria"/>
<term name="unicellular_archaebacteria"
        description="organisms that are single-celled and archaebacteria"/>
<term name="unicellular_eukaryotic"
        description="organisms that are single celled and nucleated"/>
<term name="rna_virus"
        description="viruses whose nucleic acid is composed of RNA"/>
<term name="dna_virus"
        description="viruses whose nucleic acid is composed of DNA"/>
<term name="prion"
        description="organisms not known to have a nucleic acid component"/>
<term name="multicellular_eukaryotic"
        description="organisms with nuclei and a multicellular structure unknown from a mixed or uncharacterized source"/>
</controlled_vocabulary>

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