An image forming apparatus for printing a document in accordance with document information on the document and providing one or more services related to the document to a client connected thereto via a network, comprising: one or more hardware resources being configured to form an image, wherein the one or more hardware resources comprises a printer; one or more programs executing an image formation process, wherein the one or more programs comprises a printer application for the printer; and a document management part managing one or more documents and document information thereof by associating the documents and the document information with document identification information to identify the documents; wherein the document information has document bibliography information and extended bibliography information; the image forming apparatus is configured to print the document in a manner based on the extended bibliography information; and the apparatus further comprises: an extended bibliography information providing part providing extended bibliography information to the client; and an extended bibliography information storage part storing extended bibliography information provided from the client; characterised in that the image forming apparatus is configured such that the client can change extended bibliography information stored in the extended bibliography information storage part without providing image data to the image forming apparatus. one or more hardware resources being configured to form an image, wherein the one or more hardware resources comprises a printer; one or more programs executing an image formation process, wherein the one or more programs comprises a printer application for the printer; and a document management part managing one or more documents and document information thereof by associating the documents and the document information with document identification information to identify the documents; wherein the document information has document bibliography information and extended bibliography information; the image forming apparatus is configured to print the document in a manner based on the extended bibliography information; and the apparatus further comprises: an extended bibliography information providing part providing extended bibliography information to the client; and an extended bibliography information storage part storing extended bibliography information provided from the client; characterised in that the image forming apparatus is configured such that the client can change extended bibliography information stored in the extended bibliography information storage part without providing image data to the image forming apparatus. an extended bibliography information providing part providing extended bibliography information to the client; and an extended bibliography information storage part storing extended bibliography information provided from the client; characterised in that the image forming apparatus is configured such that the client can change extended bibliography information stored in the extended bibliography information storage part without providing image data to the image forming apparatus.