Request header. Unique operation ID. Request date/time. Sender description or ID. General response for particular request General response for particular request. Response header. Operation ID (the same as in request header). Response date/time. Request status description. Sender description or ID. Simple ping command. User identifier (only characters, numbers and underscore allowed). Password. Rectangle type element. Rectangle left-top corner. Rectangle size. Point type element. Object X coordinate. Object Y coordinate. Size type element. Object width. Object height. List of notify target elements. Notify target element. Notify target. Server URL. Server authorization. Notify target communication test method. If required server is not responding then VMS will be turned off when communication timeout occurs. Default value: Required. Authorization. User name (login). Checking skipped if empty. Password. Checking skipped if empty. List of communication testing modes. Response testing skipped Response required at least from 1 Alternative type source Response required from all Required type sources List of on/off commands. OFF ON List of on/off commands. Low level High level Status code. OK Wrong login or password Internal error Request rejected Data missing or invalid File not found Invalid file format VMS status undetermined yet. Check again in few seconds Test mode (lines) in progress Test mode (LEDs) in progress Configuration failure Lines failure LEDs failure Brightness failure Timeout Out of sync Test mode (others) in progress Power supply undetermined. Check again in few seconds Power supply failure Power supply is off by USER Power supply is off due to failure (line) Power supply is off due to timeout Power supply is off due to low battery Power supply is off due to failure (led) Power supply switching on. Check again in few seconds Power supply switching off. Check again in few seconds Unknown error Plain status text. Status code. OK Power supply is off due to failure Power supply is off Test mode in progress Error detected List of On/Off elements. On/Off element. List of High/Low elements. High/Low element. List of Boolean elements. Boolean element. List of String elements. String element. List of floating point elements. Floating point element. The color entity indicates the color of an element. Color may be represented as hexadecimal RGB triples, as in HTML, or as hexadecimal ARGB tuples, with the A indicating alpha of transparency. An alpha value of 00 is totally transparent; FF is totally opaque. If RGB is used, the A value is assumed to be FF. For instance, the RGB value "#800080" represents purple. An ARGB value of "#40800080" would be a transparent purple. As in SVG 1.1, colors are defined in terms of the sRGB color space (IEC 61966).