Content acquisition documents, methods, and systems

A method can extract content of interest from a structured electronic document (15) with an electronic device (11, 51) having a processor (1100), an input device 1102, and a display device (1104). The method includes receiving through the input device (1102) an indication of a plurality of content elements (13) within a first structured electronic document (15); determining with the processor (1100) a portion of the first structured electronic document (15) associated with each indicated content element (13); and forming with the processor (1100) a common expression (3) based on the determined portions, the common expression (3) being common to all of the determined portions, wherein when the common expression (3) is applied to a second structured electronic document (15), another content element (13) is extracted from the second structured electronic document (15).