Within the Process Designer, there are several Actions that are related to the following technologies:
- HTML / CSS Selectors (Web Automation group of Actions)
- SQL Statements (Execute SQL Statement Action)
- XML / XPath Queries (XML Actions)
- JSON (Convert Json/Custom Object to Custom Object/Json, Web Service responses)
w3schools.com is a great knowledge base, in case you are interested in learning more about the above.