Open Content

Open content is an XSD 1.1 feature that allows a schema document to declare that all types defined in the schema are automatically extensible by the addition of child elements or further attributes, typically in a different namespace from the targetNamespace of the schema document.

The facility allows a complex type to specify open content with mode "interleave" or "suffix", allowing arbitrary elements (satisfying a wildcard) to be added either anywhere in the content sequence, or at the end.

At the level of a schema document, the defaultOpenContent option defines the default open content mode for all types defined in the schema document (or, for all types except those with an empty content model).

Similarly, the defaultAttributes attribute of the xs:schema element defines a default attribute wildcard to be permitted for all complex types defined in the schema document.