diff --git a/lib/Definition/PropertyDefinition.json b/lib/Definition/PropertyDefinition.json
index d1e9d2a..cd9594d 100644
--- a/lib/Definition/PropertyDefinition.json
+++ b/lib/Definition/PropertyDefinition.json
@@ -29,7 +29,7 @@
 	{
 		"name"			: "title",
 		"type"			: "string",
-		"pattern"		: "/^[a-z0-9 ]*$/i",
+		"pattern"		: "/^[a-z0-9_/- ]*$/i",
 		"max"			: 255,
 		"translation"		: {
 			"de" : "Titel",
@@ -39,7 +39,6 @@
 	{
 		"name"			: "description",
 		"type"			: "text",
-		"pattern"		: "/^[a-z0-9\s]*$/i",
 		"translation"		: {
 			"de" : "Beschreibung",
 			"en" : "Description"
@@ -353,7 +352,7 @@
 	{
 		"name"			: "photo",
 		"type"			: "string",
-		"pattern"		: "/^(http?|ftp)\://[a-z0-9\-\.]+\.[a-z]{2,6}(/\S*)?$/i",
+		"pattern"		: "/^(http?|ftp)://[a-z0-9-.]+\\.[a-z]{2,6}(/\\S*)?$/i",
 		"translation"		: {
 			"de" : "Foto (URL)",
 			"en" : "Photo (URL)"
@@ -362,7 +361,7 @@
 	{
 		"name"			: "link",
 		"type"			: "string",
-		"pattern"		: "/^(http?|ftp)\://[a-z0-9\-\.]+\.[a-z]{2,6}(/\S*)?$/i",
+		"pattern"		: "/^(http?|ftp)://[a-z0-9-.]+\\.[a-z]{2,6}(/\\S*)?$/i",
 		"translation"		: {
 			"de" : "Hyperlink",
 			"en" : "Hyperlink"