Components

 A reference to a component of a derived-type structure takes the
 following form:

   parent [%component [(s-list)]]... %component [(s-list)]

   parent    Is the name of a scalar or array of derived type.  
             The percent sign (%) is called a component selector.

   component Is the name of a component of the immediately 
             preceding parent or component. 

   s-list    Is a list of one or more subscripts. If the list 
             contains subscript triplets or vector subscripts, 
             the reference is to an array section.

             Each subscript must be a scalar numeric expression
             with a value that is within the bounds of its 
             dimension.

             The number of subscripts in any s-list must equal 
             the rank of the immediately preceding parent or 
             component.

 Each parent or component (except the rightmost) must be of derived
 type.

 The parent or one of the components can have nonzero rank (be an
 array).  Any component to the right of a parent or component of
 nonzero rank must not have the POINTER attribute.

 The rank of the structure component is the rank of the part (parent
 or component) with nonzero rank (if any); otherwise, the rank is
 zero.  The type and type parameters (if any) of a structure
 component are those of the rightmost part name.

 The structure component must not be referenced or defined before
 the declaration of the parent object.

 If the parent object has the INTENT, TARGET, or PARAMETER
 attribute, the structure component also has the attribute.

Additional information available:

Examples