# File proofreader.rb, line 80
    def regexp?(elora, die=nil)
      die = @proofsheet.die(elora.inherited_namespace, elora.absolute_xpath) if not die
      validity = true  # default /.*/ so default valid is true
      if die
        if die.regexp
          if not md = die.regexp.match(content(elora))
            validity = false
            error = "REGEXP '#{content(elora)}' /#{die.regexp.source}/"
            @errors << [die.namespace, die.xpath, error]
          end
        end
      end
      return validity
    end