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Record types
Record types, like array types, are composite types because they represent
a collection of values. In the case of a record type, the collection of
values is organized by name and can be of different types. Each value in the
collection has a name and is referenced by that name. A record type is
declared by listing the named values and their types. The grammar rule for the
record type definition is:
If the simple-name is present it must repeat the name of the record type being
defined.
There are no predefined record types. The following is an example of
a record type that might be used to define a cache element
If x was a data object of the cache_element type then the value
of the valid field of that data object is referenced by x.valid using the
dot notation.