1. A system comprising: one or more processors; a program storage device tangibly embodying a program of instructions executable by the one or more processors, the program of instructions comprising: computer program code configured to extract process descriptions from process documents, the process descriptions comprising process fragments, the process documents comprising at least one flow document and at least one text document, wherein the process description of the at least one flow document comprises a graphical process description; computer program code configured to represent the process description from the at least one text document and the graphical process description from the at least one flow document in separate canonical representations; computer program code configured to compare process fragments from the separate canonical representations; wherein the computer program code configured to compare the process fragments from the separate canonical representations is further configured to assign separate canonical representations to the process fragments from the at least one flow document and the at least one text document; computer program code configured to determine compatibility of process fragments between the at least one text document and the at least one flow document; wherein the computer program code configured to determine compatibility of process fragments between the at least one text document and the at least one flow document is further configured to assign similarity scores among pairs of fragments in response to comparing the process fragments; computer program code configured to link compatible process fragments of the at least one flow document and the at least one process document, via linking at least one process fragment from the graphical process description from the at least one flow document with at least one process fragment from the process description from the at least one text document; and computer program code configured to compute from the assigned similarity scores an aggregated similarity score between the at least one text document and the at least one flow document.