protected boolean isRegisterKeyword(String token) {
		if (token.endsWith(",") && token.length() != 0) {
			Object o = registersKeywords.get(token.substring(0,
					token.length()-1).toLowerCase());
			return o == null ? false : true;
		} else {
			Object o = registersKeywords.get(token.toLowerCase());
			return o == null ? false : true;
		}
	}