# XML

Extensible Markup Language - XML - is a markup language standard for documents that aims to be readable for both humans and machines, while separating the *markup* form the *content*.

## Syntax

XML content consists of "start", "end" and "empty" **Tags** (E.g.: `<section>` / `<section>` / `<line-break />`), which make up *elements* containing data (E.g.: `<greeting>Hello, world!</greeting>` / `<line-break />`). 

Elements can contain other elements (child elements) and form a tree: (E.g.: `<name><first>Firstname</first><last>Lastname</last></name>` / `<line-break />`). 

Start and empty tags can contain any number of unique *Attributes* consisting of name-value pairs  (E.g.: `<img src="logo.png" alt="Logo" />`).

Optionally, XML files can start with an *XML declaration* (E.g.: `<?xml version="1.0" encoding="UTF-8"?>`) identifying aspects of the XML content. 

## Example:
```xml
<?xml version="1.0" encoding="UTF-8"?>
<Config>
  <Version>V5.5-F</Version>
  <configurationEnabled>false</configurationEnabled>
  <pmaHost></pmaHost>
  <pmaPort>26401</pmaPort>
  <pmaNetworkProtocol>2</pmaNetworkProtocol>
  <pmaRequestTimeoutSeconds>60</pmaRequestTimeoutSeconds>
  <useHttpProxy>false</useHttpProxy>
  <httpProxyHost></httpProxyHost>
  <httpProxyPort>0</httpProxyPort>
  <httpProxyAuthUsername></httpProxyAuthUsername>
  <httpProxyAuthPassword></httpProxyAuthPassword>
</Config>
```