diff --git a/.settings/org.eclipse.core.resources.prefs b/.settings/org.eclipse.core.resources.prefs
index c4fecf63d6a..ef159728966 100644
--- a/.settings/org.eclipse.core.resources.prefs
+++ b/.settings/org.eclipse.core.resources.prefs
@@ -4,7 +4,6 @@ encoding//src/org/rascalmpl/library/experiments/vis2/lib/MarkdownConverter.js=UT
 encoding//src/org/rascalmpl/library/experiments/vis2/lib/nv.d3.css=UTF-8
 encoding//src/org/rascalmpl/library/experiments/vis2/lib/nv.d3.js=UTF-8
 encoding//src/org/rascalmpl/library/experiments/vis2/lib/reset.css=UTF-8
-encoding//src/org/rascalmpl/library/lang/rascal/tests/functionality/DataType.rsc=UTF-8
 encoding//test/org/rascalmpl/test/data=UTF-8
 encoding/<project>=UTF-8
 encoding/src=UTF-8
diff --git a/src/org/rascalmpl/library/lang/paths/MailAddress.rsc b/src/org/rascalmpl/library/lang/paths/MailAddress.rsc
new file mode 100644
index 00000000000..087ad4f3d54
--- /dev/null
+++ b/src/org/rascalmpl/library/lang/paths/MailAddress.rsc
@@ -0,0 +1,53 @@
+@synopsis{This encodes the mail address part of RFC822}
+@pitfalls{
+This was taken over literally from RFC822 but not tested.
+}
+module lang::paths::MailAddress
+
+lexical Address 
+    =  adressee: Mailbox
+    | namedList: Group 
+    ;
+
+lexical Group =  Phrase ":" {Mailbox ","}+ ";";
+
+lexical Mailbox  
+    = simpleAddress: AddrSpec         
+    | nameAndAddrSpec: Phrase RouteAddr
+    ;
+
+lexical RouteAddr  =  "\<" Route? AddrSpec "\>";
+
+lexical Route =  {Domain "@"}+ ":"; // hard to interpret original: 1#("@" domain) ":"  
+
+lexical AddrSpec =  globalAddress: LocalPart "@" Domain; 
+
+lexical LocalPart  =  uninterpretedCasePreserved: {Word "."}+ ;
+
+lexical Domain =  {SubDomain "."}+;
+
+lexical SubDomain  =  DomainRef | DomainLiteral;
+
+lexical DomainLiteral = "[" (Dtext | QuotedPair)* "]";
+
+lexical Dtext = (![\\\]\[\n\r\ ] + [\ ])+;
+
+lexical DomainRef =  Atom;
+
+lexical Phrase = Word+;
+
+lexical Atom = ![] - [()\<\>@,;:|\".\[\]] - [\a00-a20] - [\ ];
+
+lexical Specials = [()\<\>@,;:|\".\[\]];    
+
+lexical Controls = [\a00-\a20];
+
+lexical Word = Atom | QuotedString;
+
+lexical QuotedString = "\"" (Qtext | QuotedPair)* "\"";
+
+lexical Qtext = (![\\\"\n\r] + [\ ])+;
+
+lexical QuotedPair = "\\" CHAR;
+
+lexical CHAR = [\a00-\a7F]; // All of ASCII
diff --git a/src/org/rascalmpl/library/lang/paths/URL.rsc b/src/org/rascalmpl/library/lang/paths/URL.rsc
new file mode 100644
index 00000000000..181d4cee948
--- /dev/null
+++ b/src/org/rascalmpl/library/lang/paths/URL.rsc
@@ -0,0 +1,119 @@
+@synopsis{Implements RFC1738 for URL syntax and maps them to `loc` values.}
+@pitfalls{
+This was taken over literall from RFC1738 but not tested.
+}
+module lang::paths::URL
+
+extend lang::paths::MailAddress;
+lexical URL
+    = http:    "http://" HostPort ( "/" Hpath ( "?" Search)?)?
+    | ftp:     "ftp://" Login ("/" Fpath (";type=" FtpType)?)?    
+    | news:    "news:" GroupPart
+    | nntp:    "nntp://" HostPort "/" Group ("/" Digit+)?
+    | telnet:  "telnet://" Login "/"?
+    | gopher:  "gopher://" HostPort ( "/" ( Gtype ( Selector ("%09" Search ("%09" GopherPlusString)? )? )? )? )?
+    | waisdatabase: "wais://" HostPort "/" Database 
+    | waisindex:    "wais://" HostPort "/" Database "?" Search
+    | waisdoc:      "wais://" HostPort "/" Database "/" Wtype "/" Wpath
+    | mailto:   "mailto:" Encoded822addr
+    | file:     "file://" (Host | "localhost")? "/" Fpath
+    | prospero:  "prospero://" HostPort "/" Ppath *[ Fieldspec ]
+    | other:     Scheme ":" SchemePart
+    ;
+ 
+lexical Ppath          = {Psegment "/"}+;
+
+lexical Psegment       = (Uchar | [?:@&=])*;
+
+lexical Fieldspec      = ";" FieldName "=" FieldValue;
+
+lexical FieldName      = (Uchar | [?:@&])*;
+
+lexical FieldValue     = (Uchar | [?:@&])*;
+
+lexical Database       = Uchar*;
+lexical Wtype          = Uchar*;
+lexical Wpath          = Uchar*;
+
+lexical GroupPart = "*" | Group | Article;
+
+lexical Group  = Alpha (Alpha | Digit | [\-.+_])*;
+
+lexical Article = (Uchar | [;/?:&=])* "@" Host;
+
+lexical Encoded822addr = Xchar+; // further defined in RFC822
+
+lexical Gtype = Xchar;
+lexical Selector = Xchar*;
+lexical GopherPlusString = Xchar*;
+
+lexical Hpath = {Hsegment "/"}+;
+
+lexical Hsegment = (Uchar | [;:@&=])*;
+
+lexical Search = (Uchar | [;:@&=])*;
+
+lexical Fpath = {Fsegment "/"}+;
+
+lexical Fsegment= (Uchar | [?:@&=])*;
+
+lexical FtpType = [AIDaid];
+
+lexical Scheme = [a-z0-9+\-.]+;
+
+lexical SchemePart = Xchar* | IpSchemePart;
+
+lexical IpSchemePart = "//" Login ("/" UrlPath);
+
+lexical Login = ( User ( ":" Password )? "@" )? HostPort;
+
+lexical HostPort = Host ( ":" Port )?;
+
+lexical Host = HostName | HostNumber;
+
+lexical HostName = (DomainLabel ".")* TopLabel;
+
+lexical DomainLabel = {AlphaDigit "-"}+;
+
+lexical TopLabel = Alpha {AlphaDigit "-"}+;
+
+lexical HostNumber = Digit+ "." Digit+ "." Digit+ "." Digit+;
+
+lexical Port = Digit+;
+
+lexical User = (Uchar | [;?&=])*;
+
+lexical Password = (Uchar | [;?&=])*;
+
+lexical UrlPath = Xchar* ; //depends on protocol see section 3.1 of RFC1738
+
+lexical Alpha = LowAlpha | HighAlpha;
+
+lexical AlphaDigit = Alpha | Digit;
+
+lexical LowAlpha = [a-z];
+
+lexical HighAlpha = [A-Z];
+
+lexical Digit = [0-9];
+
+lexical Safe   = [$ \- _ . +];
+
+lexical Extra  = [!*\'(),];
+
+lexical National = [{}|\\^~\[\]`];
+
+lexical Punctuation = [\<\>#%\"];
+
+lexical Reserved = [;/?:@&=];
+
+lexical Hex = Digit | [A-Fa-f];
+
+lexical Escape = "%" Hex Hex;
+
+lexical Unreserved = Alpha | Digit | Safe | Extra;
+
+lexical Uchar = Unreserved | Escape;
+
+lexical Xchar = Unreserved | Reserved | Escape;
+