Example

To register new document, you can compose the XML manually:

from cz_urnnbn_api import api

urn_nbn = api.register_document_obj(
    api.MonographComposer(
        title="Title of the book",
        author="Name of the author",
        format="pdf"
    )
)

or use MODS metada, if you have them:

from cz_urnnbn_api import

urn_nbn = api.register_document(
    api.convert_mono_xml(open("mods_metadata.xml").read(), "pdf")
)

Then you can add digital instances to your urn_nbn identifiers:

api.register_digital_instance(
    urn_nbn=urn_nbn,
    url="someurl - lets say kramerius",
    digital_library_id="to get this, look at get_registrar_info()",
    format="epub",
    accessibility="public"
)

For list of allowed digital libraries, call get_registrar_info(), which will return Registrar with property Registrar.digital_libraries (DigitalLibrary).