Many of the taxonomy available from WAND are truly "taxonomies". An application like SharePoint 2010 or SharePoint 2013 can support Taxonomy structures but not ontologies and usually, for tagging documents, a taxonomy is a great solution. However, the WAND Product and Service Taxonomy is actually an ontology because of the attribute and attribute values. For example, we have a category of "Laptop Computers" which is a narrower term of "Personal Computers and Accessories". Laptop Computers also has a relationship with the Brand "Toshiba Satellite" because Toshiba Satellite is a "Brand of" laptop computers.
WAND is a leading provider of taxonomies. If you are looking to build taxonomies or ontologies for your organization, find out how you can access the WAND Taxonomy Library Portal to be able to browse and download any of the WAND Taxonomies.