2 <!--

     3 	Relational pipes

     4 	Copyright © 2018 František Kučera (Frantovo.cz, GlobalCode.info)

     5 	

     6 	This program is free software: you can redistribute it and/or modify

     7 	it under the terms of the GNU General Public License as published by

     8 	the Free Software Foundation, either version 3 of the License, or

     9 	(at your option) any later version.

    10 	

    11 	This program is distributed in the hope that it will be useful,

    12 	but WITHOUT ANY WARRANTY; without even the implied warranty of

    13 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

    14 	GNU General Public License for more details.

    15 	

    16 	You should have received a copy of the GNU General Public License

    17 	along with this program. If not, see <http://www.gnu.org/licenses/>.

    18 -->