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				# Copyright (C) 2022 The Software Heritage developers
				# See the AUTHORS file at the top-level directory of this distribution
				# License: GNU General Public License version 3, or any later version
				# See top-level LICENSE file for more information


				class _Namespace:
				"""Handy class to get terms within a namespace by accessing them as attributes.

				This is similar to `rdflib's namespaces
				<https://rdflib.readthedocs.io/en/stable/namespaces_and_bindings.html>`__
				"""

				def __init__(self, uri: str):
				if not uri.endswith(("#", "/")):
				# Sanity check, to make sure it doesn't end with an alphanumerical
				# character, which is very likely to be invalid.
				raise ValueError(f"Invalid trailing character for namespace URI: {uri}")
				self._uri = uri

				def __getattr__(self, term: str) -> str:
				return self._uri + term


				SCHEMA = _Namespace("http://schema.org/")
				CODEMETA = _Namespace("https://codemeta.github.io/terms/")
				FORGEFED = _Namespace("https://forgefed.org/ns#")
				ACTIVITYSTREAMS = _Namespace("https://www.w3.org/ns/activitystreams#")