diff --git a/README.md b/README.md
index c3e54ab..ce50051 100644
--- a/README.md
+++ b/README.md
@@ -11,3 +11,174 @@ through an API Gateway that supports CORS.
 Hopefully, [apicast](https://github.com/3scale/apicast) does !
 
 It is intended to be used in the 3scale developer portal.
+
+## An history of SOAP Services Documentation  
+
+Historically, SOAP Services were documented by a WSDL and their associated XSD.
+However, the level of precision and usefulness allowed by the WSDL and XSD
+annotations were mere.
+
+That's why SOAP Services were usually accompanied by another documentation,
+usually a PDF or Word document that describes fields semantic, business scenario
+that could be implemented, error handling, implementation details. Some examples
+are usually given.
+
+Those documents are maybe the most useful, in order to understand and use
+the SOAP Service.
+
+## Why a "SOAPUI" ?
+
+An implementation that only relies on WSDL and XSD to present a "Try it out"
+feature is doomed to failure. The only example that this implementation
+can propose is a sample SOAP message with question marks in each field to
+fill-in.
+
+```
+<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
+				  xmlns:acme="http://www.acme.com/">
+   <soapenv:Header/>
+   <soapenv:Body>
+      <acme:doThisAndThat>
+         <acme:foo>?</gs:foo>
+         <acme:bar>?</gs:bar>
+      </acme:doThisAndThat>
+   </soapenv:Body>
+</soapenv:Envelope>
+```
+
+But, do I need to fill in the `foo` field only ? or `bar` only ? or both ?
+Which sample values could I use in order to do this and that ?
+
+This project takes another approach that is based on examples. The idea is to
+re-use the content of existing SOAP documentation (the meaty PDF or Word
+documentation).
+
+Most of this content can already be moved to an API Developer Portal, presented
+as nice to read Web Pages.
+
+This project provides a way to document the sample SOAP calls, with an
+interactive interface where the developer can discover examples when reading
+the documentation and can try it out directly from the documentation page.
+
+Following this philosophy, the previous example would look like this:
+
+_To do this, you have to pass the `foo` field with bla bla bla. Try it by yourself:_
+```
+<acme:doThisAndThat xmlns:acme="http://www.acme.com/">
+   <acme:foo>123456</gs:foo>
+</acme:doThisAndThat>
+```
+
+_To do this, you have to pass the `bar` field with bla bla bla. Try it by yourself:_
+```
+<acme:doThisAndThat xmlns:acme="http://www.acme.com/">
+   <acme:bar>ABCDEF</gs:bar>
+</acme:doThisAndThat>
+```
+
+The result is a business documentation with real world examples that can be tried
+out by the developer.
+
+## Installation in the 3scale Developer Portal
+
+Load the following files in the 3scale Developer Portal, by creating new pages
+with the following parameters:
+
+| Title | Section | Path | Content-Type | Content |
+----
+| soapui.js | `|--javascripts` | `/javascripts/soapui.js` | `text/javascript` | [soapui.js](soapui.js) |
+| jquery.soap.js | `|--javascripts` | `/javascripts/jquery.soap.js` | `text/javascript` | [jquery.soap.js](jquery.soap/jquery.soap.js) |
+| vkbeautify.js | `|--javascripts` | `/javascripts/vkbeautify.js` | `text/javascript` | [vkbeautify.js](vkBeautify/vkbeautify.js) |
+| soapui.css | `|--css` | `/css/soapui.css` | `text/css` | [soapui.css](soapui.css) |
+
+All those pages share the same common parameters:
+ - Layout: *Leave empty*
+ - Liquid enabled: unchecked
+ - Handler: *Leave empty*
+
+Then, create a new page to hold the documentation of your SOAP Service with the following parameters:
+ - Section: `. Root`
+ - Layout: `Main Layout`
+ - Path: *something like `/docs/my_soap_service`*
+ - Content Type: `text/html`
+ - Liquid Enabled: unchecked
+ - Handler: *Leave empty*
+
+In the content, make sure to have at the top at least:
+```
+<link rel="stylesheet" type="text/css" href="/css/soapui.css">
+<script type='text/javascript' src='/javascripts/jquery.soap.js'></script>
+<script type='text/javascript' src='/javascripts/vkbeautify.js'></script>
+<script type='text/javascript' src='/javascripts/soapui.js'></script>
+<script type='text/javascript'>
+    $(document).ready(function() {
+      $(".soapui").each(function (i, e) {
+        $.soapui(e, {
+          url: 'http://api.acme.test/ws',
+          HTTPHeaders: { "user-key": "<your user-key here>" },
+          enableLogging: true,
+          appendMethodToURL: false
+        });
+      });
+    });
+</script>
+```
+
+And then write your documentation as usual:
+```
+<h2>Description of our SOAP service</h2>
+blablabla
+<h2>The getCountry method</h2>
+Here is what does the getCountry method. Blablabla.
+```
+
+When you want to insert an example, write:
+```
+<div class="soapui">
+<soap-action>http://acme.com/getCountry</soap-action>
+<soap-body>
+<!--
+<gs:getCountryRequest xmlns:gs="http://spring.io/guides/gs-producing-web-service">
+<gs:name>Spain</gs:name>
+</gs:getCountryRequest>
+-->
+</soap-body>
+</div>
+```
+
+Where the `soap-action` tag holds the value of the `soapAction` header and
+`soap-body` holds the SOAP Body (so, without the SOAP envelope) as a comment block.
+
+## Development
+
+If you would like to give a try to this project without having a 3scale
+API Management account or in order to develop more conveniently, you can
+use the `index.html` test page.
+
+First of all, clone this repository and the needed submodules:
+```
+git clone https://github.com/nmasse-itix/soapui.git
+cd soapui
+git submodule init
+git submodule update
+```
+
+Then, modify the `index.html` page to point to your sample SOAP service.
+You can also provide an API Key if you need one.
+```
+$.soapui(e, {
+  url: 'http://api.acme.test/ws',
+  HTTPHeaders: { "user-key": "<your user-key here>" },
+  enableLogging: true,
+  appendMethodToURL: false
+});
+```
+
+And fire your favourite web server:
+```
+python -m SimpleHTTPServer
+```
+
+Target your web browser to http://localhost:8000/ and you are ready to go!
+
+Note: the built-in examples use the [Spring Boot SOAP Example](https://github.com/spring-guides/gs-producing-web-service) service.