Install libpxp-ocaml-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libpxp-ocaml-dev
OCaml library that implements an XML-1.0 validating parser
PXP is a validating parser for XML-1.0 which has been written entirely in Objective Caml. . PXP is the new name of the parser formerly known as "Markup". PXP means "Polymorphic XML parser" and emphasizes its most useful property: that the API is polymorphic and can be configured such that different objects are used to store different types of elements.