--- a/bash-completion.sh	Thu Jul 22 01:06:14 2021 +0200
+++ b/bash-completion.sh	Thu Jul 22 20:01:03 2021 +0200
@@ -59,6 +59,30 @@
 		"http://docbook.org/ns/docbook"
 	)
 
+	# TODO: introspection: after moving to alt2xml the available options and their values should be provided by the parser
+
+	PARSER_OPTIONS=(
+		"encoding"
+		"parse-encapsulated"
+		"tree-style"
+		"tree-with-namespaces"
+		"root-name"
+	);
+
+	ENCODINGS=(
+		"BER"
+		"DER"
+		"CER"
+		"PER"
+		"XER"
+		"ASN.1"
+	);
+
+	TREE_STYLES=(
+		"standard"
+		"literal"
+	)
+
 
 	if   [[ "$w1" == "--relation"                      && "x$w0" == "x" ]];    then COMPREPLY=("''")
 	elif [[ "$w1" == "--records"                       && "x$w0" == "x" ]];    then COMPREPLY=("'/'")
@@ -77,9 +101,13 @@
 	elif [[ "$w2" == "--raw-xml-attribute-wrapper"      && "x$w0" == "x" ]];    then COMPREPLY=("''")
 	elif [[ "$w3" == "--raw-xml-attribute-wrapper"      && "x$w0" == "x" ]];    then COMPREPLY=("''")
 
-	elif [[ "$w1" == "--parser-option"                                  ]];    then COMPREPLY=("''")
-	elif [[ "$w2" == "--parser-option"                 && "x$w0" == "x" ]];    then COMPREPLY=("''")
-
+	elif [[ "$w1" == "--parser-option"                                                        ]];    then COMPREPLY=($(compgen -W "${PARSER_OPTIONS[*]}" -- "$w0"))
+	elif [[ "$w2" == "--parser-option" && "$w1" == "encoding"                                 ]];    then COMPREPLY=($(compgen -W "${ENCODINGS[*]}" -- "$w0"))
+	elif [[ "$w2" == "--parser-option" && "$w1" == "parse-encapsulated"                       ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
+	elif [[ "$w2" == "--parser-option" && "$w1" == "tree-style"                               ]];    then COMPREPLY=($(compgen -W "${TREE_STYLES[*]}" -- "$w0"))
+	elif [[ "$w2" == "--parser-option" && "$w1" == "tree-with-namespaces"                     ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
+	elif [[ "$w2" == "--parser-option" && "$w1" == "root-name"               && "x$w0" == "x" ]];    then COMPREPLY=("'asn1'")
+	
 	else
 		OPTIONS=(
 			"--namespace"