A configurable interface includes a transmitter module and a receiver module, each configured to operate according to at least three different interface standards. The lamp assembly includes a lamp for emitting a light and a lamp holder for receiving one end of the lamp and for emitting a portion of the light emitted from the end of the lamp. A method of making a packaging structure is also provided. Between the two parts there is a gap in which there is arranged a securing rail through which the said securing means pass. Examples of legitimacy rating information include, for example, a history rating of the content source based on the length of time the document provider has published documents associated with the content source and a transaction volume rating of the content source based on the number of electronic documents associated with the content source that are passed by the document provider.