Frequently Asked Questions
I get ‘select is empty’ but I know my xpath should match. What is wrong?
You may have forgotten to include namespaces in your xpath expression. For instance //EntityDescriptor won’t
match anything - //md:EntityDescriptor is what you want etc. PyFF is not a full XML processor and supports a
set of well-known XML namespaces commonly used in SAML metadata by prefix only. The full list of prefixes can
be found in