14. An apparatus comprising one or more non-transitory-machine-readable data storage media storing instructions operable to cause one or more data processing machines to perform operations, the operations comprising: formulating a collection of attribute suggestions based on content of two or more documents in an unstructured electronic document collection by conducting a search of the unstructured collection of electronic documents, wherein the electronic document collection is unstructured in that the format of the electronic documents in the electronic document collection is neither restrictive nor permanent; providing the attribute suggestion collection to a user; receiving a user selection of a first attribute in the collection of attribute suggestions; and adding an identifier of the first attribute suggestion to a structured presentation presented on a display screen, wherein a visual presentation of the structured presentation visually presents information in an organized arrangement, the structured presentation including values that each characterize a respective attribute of an instance, the structured presentation denoting characterization of attributes of a particular instance by particular values by virtue of an arrangement of an identifier of the particular instance and the particular values in the presentation of the structured presentation, wherein adding the identifier of the new attribute comprises: formulating a collection of attribute suggestions, wherein formulating the collection of attribute suggestions comprises: identifying a first document in the electronic document collection that is relevant to one of the instances identified in the preexisting structured presentation and that is arranged in accordance with a template, where the template is a pattern for the arrangement of the content of the first document; and adding an attribute used in the first document to characterize the instance in the attribute suggestion collection; providing the attribute suggestion collection to a user; and receiving a user selection of the new attribute, wherein the new attribute is in the collection of attribute suggestions.
15. The apparatus of claim 14 , wherein formulating the collection of attribute suggestions comprises comparing characteristics of a preexisting structured presentation with content of electronic documents in the electronic document collection.