xmlIsXHTML(const xmlChar *systemID, const xmlChar *publicID) {
    if ((systemID == NULL) && (publicID == NULL))
	return(-1);
    if (publicID != NULL) {
	if (xmlStrEqual(publicID, XHTML_STRICT_PUBLIC_ID)) return(1);
	if (xmlStrEqual(publicID, XHTML_FRAME_PUBLIC_ID)) return(1);
	if (xmlStrEqual(publicID, XHTML_TRANS_PUBLIC_ID)) return(1);
    }
    if (systemID != NULL) {
	if (xmlStrEqual(systemID, XHTML_STRICT_SYSTEM_ID)) return(1);
	if (xmlStrEqual(systemID, XHTML_FRAME_SYSTEM_ID)) return(1);
	if (xmlStrEqual(systemID, XHTML_TRANS_SYSTEM_ID)) return(1);
    }
    return(0);
}
Unknown