goldrush
Copyright (c) 2026 by The Board of Trustees of the Leland Stanford Junior
University. All rights reserved.

Licensed under the Apache License, Version 2.0 (see LICENSE).

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This product includes software ported from coalliance-matchkey
(https://github.com/co-alliance/coalliance-matchkey),
Copyright 2026 Colorado Alliance of Research Libraries,
licensed under the Apache License, Version 2.0. The ported portions are
src/goldrush/fields/, src/goldrush/util/, generator.py, and version.py.

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The ISBN-validation logic in src/goldrush/util/isbn.py is additionally derived
(via coalliance-matchkey) from the solrmarc-marc4j project, which carries the
following notice:

    Licensed to the Apache Software Foundation (ASF) under one or more
    contributor license agreements.  See the NOTICE file distributed with
    this work for additional information regarding copyright ownership.
    The ASF licenses this file to You under the Apache License, Version 2.0
    (the "License"); you may not use this file except in compliance with
    the License.  You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0
