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Standard interfaces implemented throughout the library.

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/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2011, Open Source Geospatial Foundation (OSGeo)
 *    (C) 2003-2005, Open Geospatial Consortium Inc.
 *
 *    All Rights Reserved. http://www.opengis.org/legal/
 */
package org.opengis.referencing.datum;

import static org.opengis.annotation.Obligation.*;
import static org.opengis.annotation.Specification.*;

import java.util.Date;
import org.opengis.annotation.UML;
import org.opengis.util.InternationalString;

/**
 * A temporal datum defines the origin of a temporal coordinate reference system.
 *
 * @version Abstract
 *     specification 2.0
 * @author Martin Desruisseaux (IRD)
 * @since GeoAPI 1.0
 */
@UML(identifier = "CD_TemporalDatum", specification = ISO_19111)
public interface TemporalDatum extends Datum {
    /**
     * The date and time origin of this temporal datum.
     *
     * @return The date and time origin of this temporal datum.
     */
    @UML(identifier = "origin", obligation = MANDATORY, specification = ISO_19111)
    Date getOrigin();

    /**
     * This attribute is defined in the {@link Datum} parent interface, but is not used by a
     * temporal datum.
     *
     * @return Always {@code null}.
     */
    @UML(identifier = "anchorPoint", obligation = FORBIDDEN, specification = ISO_19111)
    InternationalString getAnchorPoint();

    /**
     * This attribute is defined in the {@link Datum} parent interface, but is not used by a
     * temporal datum.
     *
     * @return Always {@code null}.
     */
    @UML(identifier = "realizationEpoch", obligation = FORBIDDEN, specification = ISO_19111)
    Date getRealizationEpoch();
}