JSR 269 Maintenance Review

As a planned part of Java SE 7, JSR 269, which standardized an API for annotation processing, is now undergoing maintenance review.
In the JCP, a maintenance review is a process to take comments on small changes so that those small changes can be formally incorporated into an existing specification without running a whole new JSR.
The changes being proposed in the JSR 269 maintenance review are the changes already implemented in the JSR 269 APIs in JDK 7.
In summary, those proposed changes are:

• Clarified interaction between the Filer and rounds.

• Constructors explicitly added to the kinds of elements that can
  be returned by RoundEnvironment.getElementsAnnotatedWith.

• New enum constant
  javax.lang.model.SourceVersion.RELEASE_7.

• In the package description of
  javax.lang.model.element, requirements on when a model
  must be provided are loosened to remove the requirement in case of an
  "irrecoverable error that could not be removed by the generation of
  new types," a condition which includes but is not limited to syntax
  errors.

• New exception type
  javax.lang.model.UnknownEntityException added as a common
  superclass for existing exception types
  UnknownAnnotationValueException,
  UnknownElementException, and
  UnknownTypeException.

• New enum constant
  javax.lang.model.element.ElementKind.RESOURCE_VARIABLE.

• New mixin interfaces Parameterizable and
  QualifiedNameable added to package
  javax.lang.model.element.
  ExecutableElement and TypeElement are
  retrofitted to extend Parameterizable;
  PackageElementand TypeElement are
  retrofitted to extend QualifiedNameable.

• Behavior of getEnclosingElement method defined to
  return the generic element of a type parameter instead of
  null.

• New interface
  javax.lang.model.type.DisjunctiveType to model
  disjunctive types.

• New enum constant
  javax.lang.model.type.TypeKind.DISJUNCTIVE to mark
  disjunctive types.

• New method visitDisjunctive added to visitor
  interface javax.lang.model.type.TypeVisitor.
  Utility visitor implementations updated accordingly.

• In the package javax.lang.model.type,
  MirroredTypesException retrofitted to be the
  superclass of MirroredTypeException.

• New utility visitors for release 7 in package
  javax.lang.model.util:

  • AbstractAnnotationValueVisitor7

  • AbstractElementVisitor7

  • AbstractTypeVisitor7

  • ElementKindVisitor7

  • ElementScanner7

  • SimpleAnnotationValueVisitor7

  • SimpleElementVisitor7

  • SimpleTypeVisitor7

  • TypeKindVisitor7

• The visitors ElementKindVisitor6,
  ElementScanner6, and SimpleElementVisitor6,
  are updated to account for new element kind
  RESOURCE_VARIABLE.

• The visitor AbstractTypeVisitor6 is updated to
  account for the possibility of visiting a
  DisjunctiveType.

• Definition of documentation comment added to javadoc of
  javax.lang.model.util.Elements.getDocComment.