EXPRESS mapping language specification sections/00-foreword.adoc sections/00-introduction.adoc sections/01-scope.adoc sections/02-normrefs.adoc sections/03-terms.adoc sections/04-overview.adoc sections/05-operators.adoc sections/06-navigation.adoc sections/07-constraints.adoc sections/08-validation.adoc sections/aa-examples.adoc sections/az-bibliography.adoc