diff -r dc5c210295d0 -r f466b4c7d9b1 streamlet-examples/__relpipe_in_filesystem_script_tesseract
--- a/streamlet-examples/__relpipe_in_filesystem_script_tesseract	Sat Jan 18 16:41:59 2020 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,48 +0,0 @@
-#!/bin/bash
-
-# Relational pipes
-# Copyright © 2020 František Kučera (Frantovo.cz, GlobalCode.info)
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, version 3 of the License.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <http://www.gnu.org/licenses/>.
-
-
-# This streamlet provides a single attribute: OCR recognized texf of given image file. It calls the tool tesseract.
-# Languages can be specified by: --option "language" "eng" --option "language" "ces"
-
-
-. "$(dirname $0)/streamlet-common.sh"
-
-processMessage_WAITING_FOR_OUTPUT_ATTRIBUTES_METADATA() {
-	tesseractLanguage="";
-	for (( i=0; i<${#optionNames[@]}; i++)); do
-		if [[ "x${optionNames[$i]}" == "xlanguage" ]]; then
-			tesseractLanguage+="+${optionValues[$i]}";
-		else
-			echo "Unsupported option: ${optionNames[$i]}" >&2
-		fi
-	done
-
-	send OUTPUT_ATTRIBUTE_METADATA "${outputAttributeAliases[0]-tesseract}"    "string"
-	send WAITING_FOR_INPUT_ATTRIBUTES
-}
-
-processMessage_WAITING_FOR_OUTPUT_ATTRIBUTES() {
-	value="$(cat "$currentFile" | tesseract stdin stdout "${tesseractLanguage:+-l}" "${tesseractLanguage}")";
-	if   [[ "x$?" == "x0" ]]; then isNull="false"; else value=""; isNull="true"; fi
-	value="$(echo "$value" | tr -d \\f)"
-	send OUTPUT_ATTRIBUTE "$value"    "$isNull";
-	send WAITING_FOR_INPUT_ATTRIBUTES;
-}
-
-initialize
-processMessages