The operationalInfo element cannot have "xsi:nil" as an attribute.
The operationalInfo element in XML instance can be substituted with other elements.
Other element cannot use operationalInfo as substitution group head if
the element's type is derived by using one of the following methods : restriction.
Use of this attribute is required.
Its form is unqualified.
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Base type of entityKey is anyURI. There are several restrictions on the value. The schema processor collapses value's whitespace. The length of the value is less than or equals to 255.