Decrypt, Validate and parse large XML files

[Arthur d]

Hi all,

I have been looking for a component for Delphi 7 (enterprise edition),
which will allow me to do the following:
1) Decrypt specific encrypted nodes in an XML file to a stream.
2) Validate specific nodes against specific schemas (typically this
will be the decrypted nodes, which will have their contents described
in a encrypted schema)
3) Parse large XML files (several hundreds MB's).

Unfortunately, I have not found any components that are capable of
this.

Does anyone know of a component which will allow me to do the above?

Kind regards,

Arthur de Beaumont