6. A mediation computer configured to generate maintenance reports, the mediation computer comprising: an interface configured to receive user input, in relation to a computer-mediated conversation between users of at least two computers, relating to maintenance of a system; and processing circuitry configured to determine a candidate tag representative of a semantic context of the user input, wherein the processing circuitry is configured to determine the candidate tag by: (i) determining the candidate tag in an instance in which the user input relates to an initial message of the conversation based upon a domain within which the user input is provided, wherein the domain is selected from the group consisting of design, manufacturing and maintenance operations of the system within which the user input is provided; and (ii) determining the candidate tag in an instance in which the user input relates to an ongoing conversation based upon the semantic context of the conversation including a mapping of words in the conversation to concepts in the respective semantic context or matching of elements in the conversation to elements within a corpus of other conversations, wherein the interface is further configured to provide an indication of the candidate tag to the user and to receive a response from the user regarding validity of the candidate tag with respect to the semantic context of the user input, and wherein the processing circuitry is further configured to cause the maintenance report to be generated and stored with the maintenance report modified to include the computer-mediated conversation and the candidate tag associated therewith.
6. A mediation computer configured to generate maintenance reports, the mediation computer comprising: an interface configured to receive user input, in relation to a computer-mediated conversation between users of at least two computers, relating to maintenance of a system; and processing circuitry configured to determine a candidate tag representative of a semantic context of the user input, wherein the processing circuitry is configured to determine the candidate tag by: (i) determining the candidate tag in an instance in which the user input relates to an initial message of the conversation based upon a domain within which the user input is provided, wherein the domain is selected from the group consisting of design, manufacturing and maintenance operations of the system within which the user input is provided; and (ii) determining the candidate tag in an instance in which the user input relates to an ongoing conversation based upon the semantic context of the conversation including a mapping of words in the conversation to concepts in the respective semantic context or matching of elements in the conversation to elements within a corpus of other conversations, wherein the interface is further configured to provide an indication of the candidate tag to the user and to receive a response from the user regarding validity of the candidate tag with respect to the semantic context of the user input, and wherein the processing circuitry is further configured to cause the maintenance report to be generated and stored with the maintenance report modified to include the computer-mediated conversation and the candidate tag associated therewith. 8. A mediation computer according to claim 6 wherein the interface is configured to receive user input by receiving user input indicating commencement of tagging by the user, and wherein the processing circuitry is configured to determine the candidate tag and the interface is configured to provide the indication of the candidate tag in response to the commencement of tagging by the user.