1. A managing method for managing data that represents a document for eventual presentation to a user, based on said data, which comprises the steps of: acquiring the data from an appropriate document source in a source representation, selectively converting the data in source representation to data in destination representation, while selectively storing in a database managed data in an intermediate representation, first, assessing quantitative storage constraints associated with storing the managed data, second, assessing quantitative physical converting constraints associated with converting the stored managed data from the source representation to the presentation representation, third, assessing the quantitative physical transfer constraints associated with transferring the managed data over a transfer facility of an applicable distributed system, and executing the converting before said storing, and/or after said storing, respectively, on a dynamic trade-off basis between said first assessment and said second assessment, while further considering one or more applicable source profiles and one or more applicable destination profiles, and in said execution providing a further dynamic trade-off basis through the application of the third assessment, wherein the selectively converting step selectively converts the data in the source representation to the data in the destination representation based on an idiosyncratic destination profile of a destination apparatus represented by the destination representation automatically and without receiving a specification of a conversion form of the data in the destination representation from a user, and wherein the quantitative physical storage constraints, the quantitative physical converting constraints, and the quantitative physical transfer constraints are made comparable through assigning to the respective constraints appropriate absolute values of a cost metric.