Compounds having the following formula or an enantiomer, diastereomer or a pharmaceutically-acceptable salt thereof, wherein X is N or C\u2014R7, are useful as kinase modulators, including IRAK-4 modulation. In another embodiment, the coating compositions can be applied directly over joints between adjacent square-edged wallboard panels to conceal the joint without using tape, wallboard \u201cmud\u201d, or other joint filling compositions. The resulting nitride waveguide may have smoother surfaces resulting in less loss of light intensity as light travels through the nitride waveguide. High aspect ratio micro-structures that are specifically designed to provide a die level interconnect configuration and mapping, are provided on the first blank surface of the wafer. The invention also includes a new representation for XPath expressions that is rich enough to express all features of XPath.