This XML Schema allows to validate either complete VDL scripts, or specific VDL chunks. describe a tranformation or derivation with metadata. describe the mapping data towards a transformation provides the unique identifier for a definition. defines the tri-state transfer modes. defines the three basic containers for parameters. defines the usage of a logical filename. defines the legal namespaces of execution profiles. defines the permissable range for version numbers. defines the permissable range for namespace identifiers. enumerates the permissable metadata types. "text" or "lfn" are permissable outside a TR. A logical filename. Pure text. "text" or "use" are permissable inside a TR. References a bound variable. name="UseType" The default is a single space. Pure text. Defines attributes for a logical filename. DEPRECATED! Will be removed soon. A simple element for text or files. A simple element for text or files. A list element containing simple elements. A simple element for text or logical filenames. A generic metadata encapsulation. A row of metadata. A "transformation" describes the specification of process environment with placeholders A "transformation" describes the specification of process environment with placeholders Annotates the transformation itself. Each parameter is declared using the "declare" element, specifying the name and container type. A declaration of a bound variable. Annotates each single formal argument. Optional default value. A list of simple scalars. A command line argument spec consists of an arbitrary number of namable chunks. Associates a local variable with a name to either an LFN or a parameter (const). A declaration of a bound variable. Like an anonymous "derivation" element, allows to call other transformations from within a compound. Annotates the call structure, which is an anonymous DV. The "pass" element established the binding between an actual parameter with its named formal counterpart. Annotates each actual argument as it is passed. A list of simple elements. Each "profile" element declares one DAGMan, Condor, VDS, or Unix environment variable. Please note that the default is a single space. A "derivation" contains actual parameters. This element must occur, even if the list is empty. A "derivation" makes use of previous or outside transformations, and fills the placeholders with specific values. Annotates the derivation itself. The "pass" element established the binding between an actual parameter with its named formal counterpart. Annotates each single actual argument. The virtual data modification language. A VDL document consists of any number of "transformation" and "derivation" elements in arbitrary order.