Copied from
w3schools PCDATA
PCDATA means parsed character data.
Think of character data as the text found between the start tag and the end tag of an XML element.
PCDATA is text that will be parsed by a parser. Tags inside the text will be treated as markup and entities will be expanded.
CDATA
CDATA also means character data.
CDATA is text that will NOT be parsed by a parser. Tags inside the text will NOT be treated as markup and entities will not be expanded.