12. An article comprising at least one non-transitory machine-readable storage medium storing instructions that upon execution cause a system having a processor to: receive data records containing user feedback regarding at least one offering; extract candidate attributes from the received data records; select a subset of attributes from among the candidate attributes, where the attributes in the selected subset relate to user sentiment regarding the at least one offering, wherein the selecting is according to selection criteria including frequency of occurrence of the candidate attributes, relative amounts of negative and positive feedback associated with the candidate attributes, and time density of feedback associated with the candidate attributes; and present for display a visualization containing a bar chart including plural bars corresponding to the attributes in the selected subset, wherein each of the plural bars depict visual indicators of at least one sentiment characteristic of the corresponding attribute in the selected subset.
12. An article comprising at least one non-transitory machine-readable storage medium storing instructions that upon execution cause a system having a processor to: receive data records containing user feedback regarding at least one offering; extract candidate attributes from the received data records; select a subset of attributes from among the candidate attributes, where the attributes in the selected subset relate to user sentiment regarding the at least one offering, wherein the selecting is according to selection criteria including frequency of occurrence of the candidate attributes, relative amounts of negative and positive feedback associated with the candidate attributes, and time density of feedback associated with the candidate attributes; and present for display a visualization containing a bar chart including plural bars corresponding to the attributes in the selected subset, wherein each of the plural bars depict visual indicators of at least one sentiment characteristic of the corresponding attribute in the selected subset. 17. The article of claim 12 , wherein the instructions upon execution cause the system to further: present for display a second visualization having a graph chart, the graph chart having a first graph for positive feedback regarding the attributes in the selected subset, and a second graph for negative feedback regarding the attributes in the selected subset.