lsolesen\pel\PelIfd::getValidTags PHP Method

    public function getValidTags()
    {
        switch ($this->type) {
            case PelIfd::IFD0:
            case PelIfd::IFD1:
                return array(PelTag::IMAGE_WIDTH, PelTag::IMAGE_LENGTH, PelTag::BITS_PER_SAMPLE, PelTag::COMPRESSION, PelTag::PHOTOMETRIC_INTERPRETATION, PelTag::IMAGE_DESCRIPTION, PelTag::MAKE, PelTag::MODEL, PelTag::STRIP_OFFSETS, PelTag::ORIENTATION, PelTag::SAMPLES_PER_PIXEL, PelTag::ROWS_PER_STRIP, PelTag::STRIP_BYTE_COUNTS, PelTag::X_RESOLUTION, PelTag::Y_RESOLUTION, PelTag::PLANAR_CONFIGURATION, PelTag::RESOLUTION_UNIT, PelTag::TRANSFER_FUNCTION, PelTag::SOFTWARE, PelTag::DATE_TIME, PelTag::ARTIST, PelTag::WHITE_POINT, PelTag::PRIMARY_CHROMATICITIES, PelTag::JPEG_INTERCHANGE_FORMAT, PelTag::JPEG_INTERCHANGE_FORMAT_LENGTH, PelTag::YCBCR_COEFFICIENTS, PelTag::YCBCR_SUB_SAMPLING, PelTag::YCBCR_POSITIONING, PelTag::REFERENCE_BLACK_WHITE, PelTag::COPYRIGHT, PelTag::EXIF_IFD_POINTER, PelTag::GPS_INFO_IFD_POINTER, PelTag::PRINT_IM, PelTag::XP_TITLE, PelTag::XP_COMMENT, PelTag::XP_AUTHOR, PelTag::XP_KEYWORDS, PelTag::XP_SUBJECT);
            case PelIfd::EXIF:
                return array(PelTag::EXPOSURE_TIME, PelTag::FNUMBER, PelTag::EXPOSURE_PROGRAM, PelTag::SPECTRAL_SENSITIVITY, PelTag::ISO_SPEED_RATINGS, PelTag::OECF, PelTag::EXIF_VERSION, PelTag::DATE_TIME_ORIGINAL, PelTag::DATE_TIME_DIGITIZED, PelTag::COMPONENTS_CONFIGURATION, PelTag::COMPRESSED_BITS_PER_PIXEL, PelTag::SHUTTER_SPEED_VALUE, PelTag::APERTURE_VALUE, PelTag::BRIGHTNESS_VALUE, PelTag::EXPOSURE_BIAS_VALUE, PelTag::MAX_APERTURE_VALUE, PelTag::SUBJECT_DISTANCE, PelTag::METERING_MODE, PelTag::LIGHT_SOURCE, PelTag::FLASH, PelTag::FOCAL_LENGTH, PelTag::MAKER_NOTE, PelTag::USER_COMMENT, PelTag::SUB_SEC_TIME, PelTag::SUB_SEC_TIME_ORIGINAL, PelTag::SUB_SEC_TIME_DIGITIZED, PelTag::FLASH_PIX_VERSION, PelTag::COLOR_SPACE, PelTag::PIXEL_X_DIMENSION, PelTag::PIXEL_Y_DIMENSION, PelTag::RELATED_SOUND_FILE, PelTag::FLASH_ENERGY, PelTag::SPATIAL_FREQUENCY_RESPONSE, PelTag::FOCAL_PLANE_X_RESOLUTION, PelTag::FOCAL_PLANE_Y_RESOLUTION, PelTag::FOCAL_PLANE_RESOLUTION_UNIT, PelTag::SUBJECT_LOCATION, PelTag::EXPOSURE_INDEX, PelTag::SENSING_METHOD, PelTag::FILE_SOURCE, PelTag::SCENE_TYPE, PelTag::CFA_PATTERN, PelTag::CUSTOM_RENDERED, PelTag::EXPOSURE_MODE, PelTag::WHITE_BALANCE, PelTag::DIGITAL_ZOOM_RATIO, PelTag::FOCAL_LENGTH_IN_35MM_FILM, PelTag::SCENE_CAPTURE_TYPE, PelTag::GAIN_CONTROL, PelTag::CONTRAST, PelTag::SATURATION, PelTag::SHARPNESS, PelTag::DEVICE_SETTING_DESCRIPTION, PelTag::SUBJECT_DISTANCE_RANGE, PelTag::IMAGE_UNIQUE_ID, PelTag::INTEROPERABILITY_IFD_POINTER, PelTag::GAMMA);
            case PelIfd::GPS:
                return array(PelTag::GPS_VERSION_ID, PelTag::GPS_LATITUDE_REF, PelTag::GPS_LATITUDE, PelTag::GPS_LONGITUDE_REF, PelTag::GPS_LONGITUDE, PelTag::GPS_ALTITUDE_REF, PelTag::GPS_ALTITUDE, PelTag::GPS_TIME_STAMP, PelTag::GPS_SATELLITES, PelTag::GPS_STATUS, PelTag::GPS_MEASURE_MODE, PelTag::GPS_DOP, PelTag::GPS_SPEED_REF, PelTag::GPS_SPEED, PelTag::GPS_TRACK_REF, PelTag::GPS_TRACK, PelTag::GPS_IMG_DIRECTION_REF, PelTag::GPS_IMG_DIRECTION, PelTag::GPS_MAP_DATUM, PelTag::GPS_DEST_LATITUDE_REF, PelTag::GPS_DEST_LATITUDE, PelTag::GPS_DEST_LONGITUDE_REF, PelTag::GPS_DEST_LONGITUDE, PelTag::GPS_DEST_BEARING_REF, PelTag::GPS_DEST_BEARING, PelTag::GPS_DEST_DISTANCE_REF, PelTag::GPS_DEST_DISTANCE, PelTag::GPS_PROCESSING_METHOD, PelTag::GPS_AREA_INFORMATION, PelTag::GPS_DATE_STAMP, PelTag::GPS_DIFFERENTIAL);
            case PelIfd::INTEROPERABILITY:
                return array(PelTag::INTEROPERABILITY_INDEX, PelTag::INTEROPERABILITY_VERSION, PelTag::RELATED_IMAGE_FILE_FORMAT, PelTag::RELATED_IMAGE_WIDTH, PelTag::RELATED_IMAGE_LENGTH);
                /*
                 * TODO: Where do these tags belong?
                 * PelTag::FILL_ORDER,
                 * PelTag::DOCUMENT_NAME,
                 * PelTag::TRANSFER_RANGE,
                 * PelTag::JPEG_PROC,
                 * PelTag::BATTERY_LEVEL,
                 * PelTag::IPTC_NAA,
                 * PelTag::INTER_COLOR_PROFILE,
                 * PelTag::CFA_REPEAT_PATTERN_DIM,
                 */
        }
    }