Global element and attribute declarations belong to this schema's target namespace.
By default, local element declarations belong to this schema's target namespace.
By default, local attribute declarations have no namespace.
Schema Composition
This schema includes components from the following schema document(s):
VOResourceRelType.xsd
Documentation
Implementation of an XML Schema describing a resource to
be used in the Virtual Observatory Project. Based on "Resource
Metadata for the Virtual Observatory", Version 0.8,
February 2002 by Bob Hanisch et al.
Diff 0.05-0.06: The Topologi tool apparently doesn't like
annotations of global elements referenced locally.
Although, this does not appear to be in violation of the XML
Schema standard, they have been commented out for the time
being.
Diff 0.06-0.1: Changed target namespace to
http://www.ivoa.net/xml/prop/VOResource.
Diff 0.8-0.1: Updated for RM v0.8; jumped version # to match RM.
Diff 0.8.1-0.8: A proposed structuring of the RM model for v0.9
Diff 0.8.2-0.8.1: "Manager" changed back to "Publisher";
"Subject" contents elevated one level, "Topic" changed back
to "Subject"; more documentation; "ResourceKey" made
mandatory; added extensible relationships.
Diff 0.8.3-0.8.2: fix bug in def of VOResource; set minimum mandatory
elements; added LogicalIdentifier; added admin attributes to Resource:
created, updated, status; moved Description, ReferenceURL, Source to
Summary element; added Source; correct misspelling of categoryType;
added "Other" type; make RelatedTo a ResourceReferenceType; dropped
ManagedResourceType; dropped Contact/Address,Phone; added role
attribute to Date; dropped ProjectRef,DataCollRef,ServiceRef,OrgRef;
Interface overhaul: move URL (as AccessURL) up as common child, move
ParamHTTPGet to VODataService (as ParamHTTP).
Diff 0.9-0.8.3: primarily version update to WD status; more
vm tagging.
For common types of interfaces, this element can be used
directly to tag the description. However, some interfaces
require additional metadata beyond what is provide by this
element; in this case, one might use a member of the
Interface substitution group (e.g. ParamHTTP from the
VODataService schema).
a reference to a group of resources which the current resouce
claims to be similar to in some way. A resource's registered
identifier (given by the Identifier element) is its default
LogicalIdentifier.
Any entity that is describable and identifiable by a IVOA Identifier.
XML Instance Representation
<vr:Resource created="xs:dateTime[0..1]?" updated="xs:dateTime[0..1]?" status="xs:string (value comes from list: {'active'|'inactive'|'deleted'})[0..1]?">
A resource that provides an interface for executing some operation
or retrieving data.
XML Instance Representation
<vr:Service created="xs:dateTime[0..1]?" updated="xs:dateTime[0..1]?" status="xs:string (value comes from list: {'active'|'inactive'|'deleted'})[0..1]?">
This is typically used as a base type for defining specific
kinds of service interfaces. If this type is used
directly, the Description element should be used to describe
how to invoke the service.
value comes from list: {'Other'|'Archive'|'Bibliography'|'Catalog'|'Journal'|'Library'|'Simulation'|'Survey'|'Transformation'|'Education'|'Outreach'|'EPOResource'|'Animation'|'Artwork'|'Background'|'BasicData'|'Historical'|'Photographic'|'Press'|'Organisation'|'Project'|'Person'}
value comes from list: {'General'|'Elementary Education'|'Middle School Education'|'Secondary Education'|'Community College'|'University'|'Research'|'Amateur'|'Informal Education'}
The XML Instance Representation table above shows the schema component's content as an XML instance.
The minimum and maximum occurrence of elements and attributes are provided in square brackets, e.g. [0..1].
Model group information are shown in gray, e.g. Start Choice ... End Choice.
For type derivations, the elements and attributes that have been added to or changed from the base type's content are shown in bold.
If an element/attribute has a fixed value, the fixed value is shown in green, e.g. country="Australia".
Otherwise, the type of the element/attribute is displayed.
If the element/attribute's type is in the schema, a link is provided to it.
For local simple type definitions, the constraints are displayed in angle brackets, e.g. <<pattern = [1-9][0-9]{3}>>.
If a local element/attribute has documentation, it will be displayed in a window that pops up when the question mark inside the attribute or next to the element is clicked, e.g. <postcode>.
Abstract(Applies to complex type definitions and element declarations). An abstract element or complex type cannot used to validate an element instance. If there is a reference to an abstract element, only element declarations that can substitute the abstract element can be used to validate the instance. For references to abstract type definitions, only derived types can be used.
Collapse Whitespace PolicyReplace tab, line feed, and carriage return characters with space character (Unicode character 32). Then, collapse contiguous sequences of space characters into single space character, and remove leading and trailing space characters.
Disallowed Substitutions(Applies to element declarations). If substitution is specified, then substitution group members cannot be used in place of the given element declaration to validate element instances. If derivation methods, e.g. extension, restriction, are specified, then the given element declaration will not validate element instances that have types derived from the element declaration's type using the specified derivation methods. Normally, element instances can override their declaration's type by specifying an xsi:type attribute.
Nillable(Applies to element declarations). If an element declaration is nillable, instances can use the xsi:nil attribute. The xsi:nil attribute is the boolean attribute, nil, from the http://www.w3.org/2001/XMLSchema-instance namespace. If an element instance has an xsi:nil attribute set to true, it can be left empty, even though its element declaration may have required content.
Prohibited Derivations(Applies to type definitions). Derivation methods that cannot be used to create sub-types from a given type definition.
Prohibited Substitutions(Applies to complex type definitions). Prevents sub-types that have been derived using the specified derivation methods from validating element instances in place of the given type definition.
Replace Whitespace PolicyReplace tab, line feed, and carriage return characters with space character (Unicode character 32).
Substitution GroupElements that are members of a substitution group can be used wherever the head element of the substitution group is referenced.
Substitution Group Exclusions(Applies to element declarations). Prohibits element declarations from nominating themselves as being able to substitute a given element declaration, if they have types that are derived from the original element's type using the specified derivation methods.
Target NamespaceThe target namespace identifies the namespace that components in this schema belongs to. If no target namespace is provided, then the schema components do not belong to any namespace.