http://schemas.xmlsoap.org/wsdl/
complexType tTypes

{http://www.w3.org/2001/XMLSchema}anyType
  {http://schemas.xmlsoap.org/wsdl/}tDocumented
      {http://schemas.xmlsoap.org/wsdl/}tExtensibleDocumented
          {http://schemas.xmlsoap.org/wsdl/}tTypes

Model

<...>
documentation?, (any element from any namespace other than http://schemas.xmlsoap.org/wsdl/)
</...>

Prohibited substitutions (block)

allowed to substitute with an xsi:type attribute with any derived type

Content Type

element-only content, not nillable.
This type can be derived by extension or restriction.

Usage

anyTopLevelOptionalElement.types, anyTopLevelOptionalElement.types, anyTopLevelOptionalElement.types