Several external entities in an XML

Hi,

I've a problem. I need to use a single XML which include the content of
several XML files.
But I don't the name of the files. I just only know that they're in a
directory ("/XMLs/*.xml").
I wold like to know if there's a way to import/include into a single XML
file several XML files as entities, using wildcards or referencing a
directory to include all the files inside it.

Could anyone help me to achieve my objective?

Thank you very much.

Greetings.

--
Jonathan Ceballos Rodriguez