separate v4 docs

docs/1.GettingStarted.md → docs/v4/1.GettingStarted.md

@@ -1,6 +1,6 @@
 Fast XML Parser is a javascript library to parse XML into JS Object, JSON or to build XML from JS Object without losing any information.
 
-The aim of this library is to provide fast error free solution to deal with XML in javascript.
+The aim of this library is to provide fast error free solution to deal with XML data format in javascript.
 
 ## Setup
 
@@ -22,11 +22,15 @@ To use it in Browser
 <small>This documentation is based on how you can use FXP(fast-xml-parser) in node js.</small>
 
 ```js
-const parser = require('fast-xml-parser');
-const fs = require('fs');
-
-const xmlDataStr = fs.readFileSync("./sample.xml").toString();
-let jsonObj = parser.parse(xmlDataStr);
+const {XMLParser, XMLBuilder, XMLValidator} = require('fast-xml-parser');
+
+if(XMLValidator.validate(){
+    const parser = new XMLParser();
+    let jsonObj = parser.parse(xmlData);
+
+    const builder = new XMLBuilder();
+    let samleXmlData = builder.build(jsonObj);
+}
 ```
 
-[> Next: Options to parse XML](./2.XMLparseOptions.md)
+[> Next: XmlParser](./2.XMLparseOptions.md)