diff -r d4c2968a391f -r d7ae02390fac relpipe-data/examples-guile-projections.xml
--- a/relpipe-data/examples-guile-projections.xml	Sat Sep 12 13:20:21 2020 +0200
+++ b/relpipe-data/examples-guile-projections.xml	Fri Sep 25 14:38:24 2020 +0200
@@ -2,14 +2,14 @@
 	xmlns="https://trac.frantovo.cz/xml-web-generator/wiki/xmlns/strana"
 	xmlns:m="https://trac.frantovo.cz/xml-web-generator/wiki/xmlns/makro">
 	
-	<nadpis>Doing projections with Guile</nadpis>
+	<nadpis>Doing projections with Scheme</nadpis>
 	<perex>modifying attribute values and adding new attributes or removing them</perex>
 	<m:pořadí-příkladu>01500</m:pořadí-příkladu>
 
 	<text xmlns="http://www.w3.org/1999/xhtml">
 		
 		<p>
-			The <code>relpipe-tr-guile</code> can not only filter records,
+			The <code>relpipe-tr-scheme</code> can not only filter records,
 			but can also modify them and even modify the structure of the relation – add or remove attributes.
 			
 		</p>
@@ -55,11 +55,11 @@
 		<h2>Modifying attribute values</h2>
 
 		<p>
-			Then, we can modify such relation using Guile – e.g. we can make the <code>name</code> uppercase and increase <code>id</code> by 1000:
+			Then, we can modify such relation using Scheme – e.g. we can make the <code>name</code> uppercase and increase <code>id</code> by 1000:
 		</p>
 		
 		<m:pre jazyk="bash"><![CDATA[sample-data \
-	| relpipe-tr-guile \
+	| relpipe-tr-scheme \
 		--relation n \
 		--for-each '(set! $name (string-upcase $name) ) (set! $id (+ $id 1000) )' \
 	| relpipe-out-tabular]]></m:pre>
@@ -85,7 +85,7 @@
 		</p>
 	
 		<m:pre jazyk="bash"><![CDATA[sample-data \
-	| relpipe-tr-guile \
+	| relpipe-tr-scheme \
 		--relation n \
 		--for-each '(set! $name (string-upcase $name) ) (set! $id (+ $id 1000) )' \
 		--output-attribute 'id' integer \
@@ -112,7 +112,7 @@
 		</p>
 		
 		<m:pre jazyk="bash"><![CDATA[sample-data \
-	| relpipe-tr-guile \
+	| relpipe-tr-scheme \
 		--relation n \
 		--for-each '(define $sum (+ $a $b $c) )' \
 		--output-attribute 'sum' integer \
@@ -144,7 +144,7 @@
 		</p>
 		
 		<m:pre jazyk="bash"><![CDATA[sample-data \
-	| relpipe-tr-guile \
+	| relpipe-tr-scheme \
 		--relation n \
 		--for-each '(define $id (string-upcase $name) )' \
 		--output-attribute 'id' string \
@@ -176,7 +176,7 @@
 		</p>
 		
 		<m:pre jazyk="bash"><![CDATA[sample-data \
-	| relpipe-tr-guile \
+	| relpipe-tr-scheme \
 		--relation n \
 		--for-each '(set! $name (string-upcase $name) ) (set! $id (+ $id 1000) )' \
 		--output-attribute 'id' integer \