1. A method for converting a fixed format document containing text runs with common formatting into a flow format document, the method comprising the acts of: analyzing a fixed format document to determine a plurality of properties associated with a plurality of paragraphs contained in the fixed format document, wherein the determined plurality of properties include a paragraph property and a character property; associating each paragraph property and each character property with a discrete value or with a continuous value, wherein the discrete value comprises a numerical value and the continuous value comprises a numerical interval; determining a dominant character property for each of the plurality of paragraphs based on a most commonly occurring character property discrete value within the respective paragraph; grouping each of the plurality of paragraphs into clusters according to a common dominant character property; dividing each cluster of paragraphs into a plurality of sub-clusters of paragraphs, wherein each sub-cluster of paragraphs has a common paragraph property discrete value or a common character property discrete value that is different from the common dominant character property discrete value; for the paragraphs in each of the plurality of sub-clusters, determining that the paragraphs have a common paragraph property or a common character property associated with a plurality of different intervals of continuous values, and normalizing those plurality of different intervals to a single numerical value; associating the single numerical value with the common paragraph property or common character property previously associated with the continuous value; determining a style for each paragraph of the document based on: (a) the dominant common character property discrete value; (b) the common paragraph property discrete value or the common character property discrete value that is different from the dominant common character property discrete value; and (c) the normalized single numerical value of the common paragraph property or common character property that was previously associated with the continuous value; and mapping each paragraph to a flow format document with its determined style.