=encoding utf8

=head1 NAME

Geo::GML::Util - GML useful constants

=head1 INHERITANCE

 Geo::GML::Util
   is a Exporter

=head1 SYNOPSIS

  use Geo::GML;
  use Geo::GML::Util ':gml311';

=head1 DESCRIPTION

XML uses long URLs to represent name-spaces, which must be used without
typos.  Therefore, it is better to use constants instead: the main
purpose for this module.

=head1 FUNCTIONS

=head2 Constants

=head3 Export Tag :protocols

This tag will give you access to the the name-space constants for
all recognisable GML versions, like NS_GML_32.

=head3 Export Tags

The following tags define all what you need per version.

  :gml212    2.1.2
  :gml300    3.0.0
  :gml301    3.0.1
  :gml310    3.1.0
  :gml311    3.1.1
  :gml321    3.2.1

=head1 SEE ALSO

This module is part of Geo-GML distribution version 0.18,
built on January 19, 2018. Website: F<http://perl.overmeer.net/CPAN/>

=head1 LICENSE

Copyrights 2008-2018 by [Mark Overmeer]. For other contributors see ChangeLog.

This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
See F<http://dev.perl.org/licenses/>

