This is the schema file to be referenced in instance documents for validation. It is the top level schema file that integrates the schema components. This version integrates UBIF and SDD. To add further object types, this file has to be changed. See UBIF.xsd for UBIF and SDD_Types.xsd for SDD copyright annotation! Copyright © 2005 TDWG (Taxonomic Databases Working Group, www. tdwg.org). See the file SDD_(c).xsd for authorship and licensing information. ! Use Datasets (not Dataset below) as root element in UBIF instance documents! Datasets is a collection containing 1..n Dataset elements; the element is defined in the indirectly included file UBIF_RootIdentityConstraints.xsd. The Dataset element defined below should not be used as root element - in the majority of cases this is in fact impossible because of identity constraints depending on the Datasets root. Data from one or several object types, with common technical and content metadata. Metadata describing provider and process that created the current xml document. The provider is not necessarily the creator or owner of the dataset, compare content Metadata. Metadata referring to the principal source of the entire data collection (the metadata scope may be wider than the objects actually contained in the data set). Taxon names used in the data set. Each object contains a name - either locally defined or representing an external resource defined in a linking mechanism and defines a local id attribute that may be referred to multiple times from within the data set. Biology: Object in a nomenclator Optional hierarchy (= tree, biology: taxonomy) of taxon classes defined above. A hierarchy may be incomplete, i. e. some TaxonName object may not be in the hierarchy. TaxonHierarchies may be locally defined or represent an external source. Biology: Taxonomic hierarchy, or arbitrary set of taxa. Specimens (including ABCD.Units) are physical objects that have been collected or observed. Objects being observed or in a collection. Specimens may be identified or assigned to a taxon name as types. Documentation of persons/organizations involved in the authoring, compiling, editing, etc. of the data set. @@ The specific elements are only a preliminary sketch, this needs synchronization with TDWG ABCD! Publications used in the data set, defined through objects (= local or external link, see under Agents). Printed or digital publication (including database source) Geographical locations (often country names, but potentially on any level), defined through objects (= local or external link, see under Agents). An example of an external gazetteer referred to is the TDWG Geography standard. Resource definitions containing links like URLs or actually embedding the resource (e. g. encoded images). An Audience is an extension of language (including dialect), with expertise (pupil, beginner, expert) and other parameters (olicy makers, farmers, etc.) Collection for an object type not yet defined in the types above @@@ The 'payload' of the dataset exchanged using UBIF. At this point a new namespace is defined (and usually the default namespace is redefined). Note that if an xsi:schemaLocation is desired, it may not be defined here but must be added to an xsi:schemaLocation attribute in the Datasets root element.