diff --git a/Readme.md b/Readme.md
index 922aee25f0c35ccd2fd0c824dbe017054fd9e633..073d63b335352b2282e24538e49057765f6c754e 100644
--- a/Readme.md
+++ b/Readme.md
@@ -8,7 +8,9 @@ More info at [TDL website](https://tdl.etsi.org)
 
 The TDL tools are available as a set of Eclipse plug-ins. You need to first be able to run Eclipse. The [Eclipse Modeling Tools](https://www.eclipse.org/downloads/packages/release/2021-06/r/eclipse-modeling-tools) distribution contains most of the necessary prerequisites for the TDL tools.
 
-Once Eclipse is up and running, you need to add the [update site](https://tdl.etsi.org/eclipse/latest/) for the TDL tools: 
+Once Eclipse is up and running, the easiest way to install the TOP tools is from the Eclipse Marketplace - simply search for TDL in the Eclipse Marketplace client within Eclipse, or go to the [TOP Marketplace Listing](https://marketplace.eclipse.org/content/top-tdl-open-source-project) and drag the install button into the Eclipse window.
+
+Alternatively, can install the plug-ins manually from an update site. In this case, you need to add the [update site](https://tdl.etsi.org/eclipse/latest/) for the TDL tools: 
 
     https://tdl.etsi.org/eclipse/latest/
 
@@ -48,6 +50,12 @@ The same steps can be applied to create a new TDL model by means of the brace-ba
 
 More information on using the plugins is available at [Usage wiki](https://labs.etsi.org/rep/top/ide/-/wikis/Usage).
 
+## Textual Syntax Specifications
+
+The complete specification for the standardised textual syntax ([ES 203 119-8 v1.1.1 (to be published in March 2022)](https://tdl.etsi.org/index.php/downloads))  as well as the corresponding extensions for Structured Testo Objective Specifications ([ES 203 119-4 v1.5.1, clause 8 (to be published in March 2022)](https://tdl.etsi.org/index.php/downloads)) Extended Test Configurations ([ES 203 119-7 v1.3.1, clause 8 (to be published in March 2022)](https://tdl.etsi.org/index.php/downloads)) is available in [TDLtx.xtext](plugins/org.etsi.mts.tdl.tx/src/org/etsi/mts/tdl/TDLtx.xtext). It uses the [Xtext Grammar Language](https://www.eclipse.org/Xtext/documentation/301_grammarlanguage.html) which also allows the specification of the bindings between the textual syntax elements and the meta-model elements. By default, brace-based delimiters are used (i.e. the "brace-based variant"). Instead, the [TDLtxi.xtext](plugins/org.etsi.mts.tdl.txi/src/org/etsi/mts/tdl/TDLtxi.xtext) specifies the necessary overrides for the indentation-based delimiters (i.e. the "indentation-based variant"). 
+
+From end-user's perspective this translates to two file extensions - `.tdltx` for the brace-based variant and `.tdltxi` for the indentation-based variant. The TOP plug-ins provide a function (from the menu "TDL->Translate TDL modeling") to convert between the available formats, including the standardised exchange format ([ES 203 119-3 v1.5.1 (to be published in March 2022)](https://tdl.etsi.org/index.php/downloads)). The available formats depend on the installed plug-ins.
+
 ## Setting up a local environment for development and testing
 
  * Download and install Eclipse Modeling Tools package
@@ -93,9 +101,11 @@ Part of the implementation was developed as a lab project with contributions fro
 The generation of data types based on ASN.1 specifications is based on the [BeanIt ASN1Bean](https://github.com/beanit/asn1bean) (formerly known as jASN).
 
 The implementation currently supports: 
- * Importing of data definitions within the module (imports from other modules are currently not resolved).
+ * Importing of data definitions within the module (imports from other modules) are currently not resolved.
  * Application of annotations or data constraints (e.g. for `CHOICE` data types or other modifiers).
 
+Note that the upstream components provided by the ASN1Bean may not be able to process all ASN.1 specifications as they do not provide 100% coverage of the ASN.1 syntax. In this case, the outcome may be incomplete.
+
 ### Implementation of the transformation of Structured Test Objectives to TDL Test Descriptions
 The transformation of Structured Test Objectives into TDL Test Descriptions currently supports:
  * Transforming of inline data descriptions within `EventOccurrences` into corresponding data types.