Abstract: A method, an apparatus and a computer program enable viewing of data of documents to be printed on a client computer. A client computer includes a version y of a conversion function for converting document data into raster image data and a version z of a client viewer application. A print server includes a version x of the conversion function and a version x of the client viewer application. The method includes the steps of replacing the version y of the conversion function by the version x of the conversion function on the client computer, if the version x is more recent than the version y; installing the version x of the client viewer application on the client computer, if the version z is different from the version x; converting the document data on the client computer; and displaying the image data.

Abstract: A method and apparatus are provided for viewing on a client device document data representing at least a part of a document to be printed. The method includes transferring the document to be printed from a client device to a print server, converting at the print server the document to be printed into document data, and transferring the document data from the print server to the client device. The document data are at least part of a raster image file obtained by a raster conversion function, the raster conversion function being used to print the document.