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crawler-commons is a set of reusable Java components that implement functionality common to any web crawler.

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/**
 * Copyright 2018 Crawler-Commons
 * 
 * Licensed 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
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package crawlercommons.sitemaps.extension;

/** Sitemap extensions supported by the parser. */
public enum Extension {
    /**
     * Google News sitemaps, see
     * https://support.google.com/news/publisher-center/answer/74288
     */
    NEWS,
    /**
     * Google Image sitemaps, see
     * https://support.google.com/webmasters/answer/178636
     */
    IMAGE,
    /**
     * Google Video sitemaps, see
     * https://support.google.com/webmasters/answer/80471
     */
    VIDEO,
    /**
     * Usage of <xhtml:links> in sitemaps to include
     * localized page versions/variants, see
     * https://support.google.com/webmasters/answer/189077
     */
    LINKS,
    /**
     * Mobile sitemaps just contain an empty "mobile" tag to identify a
     * URL as having mobile content, cf.
     * http://www.google.com/schemas/sitemap-mobile/1.0
     */
    MOBILE
}