diff --git a/plugins/org.etsi.mts.tdl.library/.classpath b/plugins/org.etsi.mts.tdl.library/.classpath
new file mode 100644
index 0000000000000000000000000000000000000000..685a6999c9acba0d0158b0929d7a4d384644452e
--- /dev/null
+++ b/plugins/org.etsi.mts.tdl.library/.classpath
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="target/classes"/>
+</classpath>
diff --git a/plugins/org.etsi.mts.tdl.library/.project b/plugins/org.etsi.mts.tdl.library/.project
new file mode 100644
index 0000000000000000000000000000000000000000..c6e2ee4d346214df5080b87809e67b41c3928bdc
--- /dev/null
+++ b/plugins/org.etsi.mts.tdl.library/.project
@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>org.etsi.mts.tdl.library</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.ManifestBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.SchemaBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.m2e.core.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.m2e.core.maven2Nature</nature>
+		<nature>org.eclipse.pde.PluginNature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+	<filteredResources>
+		<filter>
+			<id>1681412457721</id>
+			<name></name>
+			<type>30</type>
+			<matcher>
+				<id>org.eclipse.core.resources.regexFilterMatcher</id>
+				<arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+			</matcher>
+		</filter>
+	</filteredResources>
+</projectDescription>
diff --git a/plugins/org.etsi.mts.tdl.library/.settings/org.eclipse.core.resources.prefs b/plugins/org.etsi.mts.tdl.library/.settings/org.eclipse.core.resources.prefs
new file mode 100644
index 0000000000000000000000000000000000000000..99f26c0203a7844de00dbfc56e6a35d8ed3c022c
--- /dev/null
+++ b/plugins/org.etsi.mts.tdl.library/.settings/org.eclipse.core.resources.prefs
@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+encoding/<project>=UTF-8
diff --git a/plugins/org.etsi.mts.tdl.library/.settings/org.eclipse.jdt.core.prefs b/plugins/org.etsi.mts.tdl.library/.settings/org.eclipse.jdt.core.prefs
new file mode 100644
index 0000000000000000000000000000000000000000..a58ebdcad300d0a088dcbd63941d2c89e78a4f98
--- /dev/null
+++ b/plugins/org.etsi.mts.tdl.library/.settings/org.eclipse.jdt.core.prefs
@@ -0,0 +1,15 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=11
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=11
diff --git a/plugins/org.etsi.mts.tdl.library/.settings/org.eclipse.m2e.core.prefs b/plugins/org.etsi.mts.tdl.library/.settings/org.eclipse.m2e.core.prefs
new file mode 100644
index 0000000000000000000000000000000000000000..f897a7f1cb2389f85fe6381425d29f0a9866fb65
--- /dev/null
+++ b/plugins/org.etsi.mts.tdl.library/.settings/org.eclipse.m2e.core.prefs
@@ -0,0 +1,4 @@
+activeProfiles=
+eclipse.preferences.version=1
+resolveWorkspaceProjects=true
+version=1
diff --git a/plugins/org.etsi.mts.tdl.library/META-INF/MANIFEST.MF b/plugins/org.etsi.mts.tdl.library/META-INF/MANIFEST.MF
new file mode 100644
index 0000000000000000000000000000000000000000..f70487877b3b0fab0afdd46280baeb21744eb188
--- /dev/null
+++ b/plugins/org.etsi.mts.tdl.library/META-INF/MANIFEST.MF
@@ -0,0 +1,7 @@
+Manifest-Version: 1.0
+Bundle-ManifestVersion: 2
+Bundle-Name: Standard Libraries
+Bundle-SymbolicName: org.etsi.mts.tdl.library
+Bundle-Version: 1.0.0.qualifier
+Automatic-Module-Name: org.etsi.mts.tdl.library
+Export-Package: org.etsi.mts.tdl.library
diff --git a/plugins/org.etsi.mts.tdl.library/build.properties b/plugins/org.etsi.mts.tdl.library/build.properties
new file mode 100644
index 0000000000000000000000000000000000000000..56d776555503f2905e0642aae5be7938371a965d
--- /dev/null
+++ b/plugins/org.etsi.mts.tdl.library/build.properties
@@ -0,0 +1,4 @@
+source.. = src/
+output.. = target/classes/
+bin.includes = META-INF/,\
+               .
diff --git a/plugins/org.etsi.mts.tdl.library/pom.xml b/plugins/org.etsi.mts.tdl.library/pom.xml
new file mode 100644
index 0000000000000000000000000000000000000000..133997be495b051f4b213dd32ab096776e0edf40
--- /dev/null
+++ b/plugins/org.etsi.mts.tdl.library/pom.xml
@@ -0,0 +1,19 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+	  <groupId>org.etsi.mts.tdl</groupId>
+    <artifactId>org.etsi.mts.tdl.parent</artifactId>
+	  <version>1.0.0-SNAPSHOT</version>
+	  <relativePath>../../org.etsi.mts.tdl.parent</relativePath>
+
+  </parent>
+  <artifactId>org.etsi.mts.tdl.library</artifactId>
+  <packaging>eclipse-plugin</packaging>
+  <build>
+    <plugins>
+      <plugin>
+        <artifactId>maven-compiler-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
+</project>
\ No newline at end of file
diff --git a/plugins/org.etsi.mts.tdl.library/src/org/etsi/mts/tdl/library/HTTP.tdltx b/plugins/org.etsi.mts.tdl.library/src/org/etsi/mts/tdl/library/HTTP.tdltx
new file mode 100644
index 0000000000000000000000000000000000000000..b1a4f2f0302a374641989f934db04e6e73cee91d
--- /dev/null
+++ b/plugins/org.etsi.mts.tdl.library/src/org/etsi/mts/tdl/library/HTTP.tdltx
@@ -0,0 +1,126 @@
+Package HTTP { 
+	Package MessageBasedConfiguration {
+        Import all from MessageBased
+        Message Gate HTTPGate accepts Request,Response
+        Component API {
+            //Add variables and timers here or define new component types and configurations 
+            gate HTTPGate http
+        }
+        Configuration BasicClientServer {
+            API client as Tester,
+            API server as SUT,
+            connect client::http to server::http
+        }
+    
+	} Note : "Message based types and instances"
+	
+	Package MessageBased {
+        Import all from Standard
+        
+        //Generic Method type -> required for generation!!!
+        Enumerated Method {
+	        Method GET,
+	        Method POST,
+	        Method PUT,
+	        Method PATCH,
+	        Method DELETE
+        }
+
+        //Generic Request type    
+        Structure Request (
+            String uri,
+            optional Method method,
+            optional Headers headers,
+            optional Parameters parameters,
+            optional Body body
+        )
+        
+        //Generic Request instances
+        Request GET ( )
+        Request POST ( )
+        Request PUT ( )
+        Request PATCH ( )
+        Request DELETE ( )
+        
+        //Generic Response type    
+        Structure Response (
+            optional Integer status,
+            optional String statusMessage,
+            optional Headers headers,
+            optional Body body
+        )
+        
+        //Generic Response instances, name = status code
+        
+        Response r200 (statusMessage = "OK")
+        Response r201 (statusMessage = "Created")
+        Response r204 (statusMessage = "No Content")
+        Response r400 (statusMessage = "Bad Request")
+        Response r401 (statusMessage = "Not Found")
+        Response r403 (statusMessage = "Not Authorized")
+        Response r404 (statusMessage = "Forbidden")
+
+        //Generic Response instances, name = status message        
+        Response OK (status = "200")
+        Response Created (status = "201")
+        Response NoContent (status = "204")
+        Response BadRequest (status = "400")
+        Response NotFound (status = "404")
+        Response NotAuthorized (status = "401")
+        Response Forbidden (status = "403")
+        
+        //supporting types
+        Collection Parameters of Parameter
+        Structure Parameter (
+            Location location,
+            String ^name,
+            String ^value
+        )
+        Type Location
+        Location path
+        Location query
+
+        //may need a structure, not necessarily relevant in standardized testing
+        Location cookie
+        
+        //separate headers -> not necessary
+        //Location header;
+        Collection Headers of Header
+        Structure Header (
+            String ^name,
+            String ^value
+            //not relevant in TDL? 
+            //optional contentLength of type Integer,
+            //optional contentType of type String 
+        )
+        
+        //Base body for extension
+        Structure Body ( )
+        
+        //Basic string body
+        Structure StringBody extends Body (
+            String text
+        )
+        
+        //Basic wrapper for collection responses
+        Structure CollectionBody extends Body (
+            Bodies items
+        )
+        
+        //Any body can be included
+        //If consistent type is needed, a custom subtype shall be defined and used 
+        Collection Bodies of Body
+        
+        //Custom collection data instances can be defined
+        //  - inline in the responses 
+        //  - predefined as a separate data element
+        //Custom collection data instances can be defined 
+        //to enforce type consistency specific for API 
+    
+        //Basic form body    
+        Structure FormBody extends Body (
+            String field,
+            String content
+        )
+    } 
+}
\ No newline at end of file
diff --git a/plugins/org.etsi.mts.tdl.library/src/org/etsi/mts/tdl/library/Standard.tdltx b/plugins/org.etsi.mts.tdl.library/src/org/etsi/mts/tdl/library/Standard.tdltx
new file mode 100644
index 0000000000000000000000000000000000000000..38829c358676ab4e79cd0d7cf73da571544bc05a
--- /dev/null
+++ b/plugins/org.etsi.mts.tdl.library/src/org/etsi/mts/tdl/library/Standard.tdltx
@@ -0,0 +1,56 @@
+Package TDL {
+	//TODO: extract to standard library
+	Constraint length
+	Constraint minLength
+	Constraint maxLength
+	Constraint range
+	Constraint format
+	Constraint union
+	Constraint uniontype
+	
+	Type Boolean
+	Type Integer
+	Type String
+	Type Verdict
+	
+	//TODO: these do not work at present -> literal values take precedence?
+//	Boolean true
+//	Boolean false
+	Boolean True
+	Boolean False
+	
+	Verdict pass
+	Verdict fail
+	Verdict inconclusive
+	
+	Time second
+	
+	Annotation Master
+	Annotation MappingName
+
+    //standard annotations for STO
+    Annotation Initial conditions
+    Annotation Expected behaviour
+    Annotation Final conditions
+    Annotation Test Purpose Description
+    Annotation when
+    Annotation then
+	
+	Predefined == returns Boolean
+	Predefined != returns Boolean
+	Predefined and returns Boolean
+	Predefined or returns Boolean
+	Predefined xor returns Boolean
+	Predefined not returns Boolean
+	Predefined < returns Boolean
+	Predefined > returns Boolean
+	Predefined <= returns Boolean
+	Predefined >= returns Boolean
+	Predefined +
+	Predefined -
+	Predefined *
+	Predefined /
+	Predefined mod
+	Predefined size returns Integer
+	
+}
\ No newline at end of file