Lists all ICA tag identifiers.

Values:

IGMDTAG_ID_ICA_FORMAT	IOCA metadata format identifier.
IGMDTAG_ID_ICA_WIDTH	Image width.
IGMDTAG_ID_ICA_HEIGHT	Image height.
IGMDTAG_ID_ICA_DEPTH	Image depth.
IGMDTAG_ID_ICA_XDPI	Horizontal image resolution.
IGMDTAG_ID_ICA_YDPI	Vertical image resolution.
IGMDTAG_ID_ICA_BITORDER	Bit order.
IGMDTAG_ID_ICA_BASE	Size units value.
IGMDTAG_ID_ICA_COMPRESSION	Image compression.
IGMDTAG_ID_ICA_FILLORDER	Fill order.