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Previous Stable Release

Please note that the V3 release branch is now the previous stable release, with the current stable releases from the V4 branch.
Support for V3 will end on Dec 31, 2020.

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This element is available in V3.4 and later of the software.


This element defines an attribute used as input to the containing <AttributeDefinition> or <DataConnector>.

This element is defined by the urn:mace:shibboleth:2.0:resolver schema, which is located at





This is the identifier of an <AttributeDefintion> plugin


The precise semantics of this element depend on the type of the enclosing <AttributeDefinition> or <DataConnector>.

Multi-Attribute Definitions

Multi-attribute definitions refers to <AttributeDefinition> or <DataConnector> types which consume multiple attributes. The current supported definitions are:

In this case the attribute and all its values are made available to the enclosing definition.  If an attribute of the same name has already been provided, then the values are combined.

Multi-Value Definitions

Multi-value definitions refers to <AttributeDefinition> or <DataConnector> types which consume multiple attribute values. These values are often, but not always, from one definition. Nearly all attribute definitions are multi-value. The ComputedIdConnector is a degenerate Multi-Value Definition in that it requires a single value (which may come from multiple sources, all but one of which would be empty).

In this case all the attribute values are made available. Values from multiple attributes are combined.

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