How does the LSP implements the Syntax Highlight?

[Gl1TcH-1n-Th3-M4tR1x]

How does the LSP implements the Syntax Highlight? where are the Highlight rules defined? say you want to define : BEGIN as a keyword and you want the keywords to be RED.

Is there any document explaining how to create a LSP implementation for a new language?

[cdietrich]

In LSP syntax highlighting is a client side thing so far. There is microsoft/language-server-protocol#124 to change this