Abstract:
In an electronic transaction carried out in a virtual commerce space closed on an internet, when persons concerned with the transaction belong to different counties, it has hitherto been practiced that the persons concerned with the transaction manually proceed with business processes inherent in trading such as acquisition of export application and customs procedures on paper base in addition to an electronic payment process carried out on the virtual space region. To eliminate the manual business processing, an electronic commerce system connected to the virtual commerce space constructed on the internet and having a trading function, includes server units in which tax, carriage and insurance premium incurred, when a trading transaction is carried out, are automatically calculated, added, as reference information, to estimation information and then registered. When an order/reception process is carried out between different countries during purchase order, workflows concerning trading business are automatically prepared and registered and trading document information necessary for service defined on the workflows is automatically prepared.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    The present invention relates to a server for trading operation.  
           [0002]    Conventionally, as described in JP-A- 10-207956 , an electronic payment system for constructing an electronic commerce transaction which maintains, in a virtual space region, security of order/order acceptance of goods at a remote location, payment for the order and actual delivery of the goods has been employed to certify the presence of the goods and the presence of payment sum, thereby making a rule for universality of safety of transaction between persons concerned with the commerce transaction. When, in the prior art, the persons concerned with transaction belong to different countries, they not only conduct the electronic payment process in the virtual space region but also must manually proceed with business processes inherent in trading such as acquirement of an export application and customs clearance procedures. In the event that the export application is rejected, the transaction becomes impossible. Inconveniently, however, the aforementioned prior art system cannot support the function to cope with such a situation and a user is necessarily forced to proceed with a work on non-electronic document base.  
           [0003]    Besides, putting documents for the order/reception process aside, at least 40 documents must be prepared in typical trading operation and the prepared documents must be circulated to about 30 dealers concerned, so that persons in charge are required to have expert skill that is higher than that in domestic transaction processing. Further, posting and circulation of documents carried out on paper base make it difficult to prevent artificial errors such as clerical errors, leading to a major cause of the occurrence of reworking. Furthermore, since a plurality of dealers are involved, progress conditions of documents are hardly grasped to give rise to a cause of prolongation of time required for establishment of the transaction. Additionally, in the case of international transaction, additional fees such as tax and insurance premium are incurred in many cases, thus raising a problem that even when an estimation answer is received from a counterpart firm, cost calculation cannot be done accurately unless persons in charge of order attend to service by being well aware of the overseas transaction practice.  
         SUMMARY OF THE INVENTION  
         [0004]    The present invention intends to permit the business process to be conducted similarly to domestic transactions without resort to consciousness of the business process inherent in trading when persons concerned with commerce proceed with services concerning order/reception over different countries. More specifically, in response to an oversea answer to inquiry, additional expenditure incurred in addition to answered estimation sum can be calculated automatically without asking an estimation receiver to proceed with a special process and results of the automatic calculation can be added and presented. It is also intended that during an overseas order process, documents necessary for a required trading operation process and clerical work of preparation of trading documents can be arranged automatically and electronic forwarding of the trading documents to dealers concerned can be effected automatically without resort to order sender and order receiver.  
           [0005]    According to an aspect of the present invention, to accomplish the above object, an electronic commerce system connected to a virtual commerce space constructed on an internet and having a function of trading comprises subsystems participating in trading management related to a series of operations ranging over estimation answer and order processing in trading transactions, the subsystems including a subsystem having an estimation support function, a subsystem having a trading cost calculation function, a subsystem having an electronic purchase order support function, a subsystem having a workflow management function, a subsystem having a trading document preparation function, a subsystem having a user information management function, and a subsystem having a global information management function. During the preparation of an estimation answer, the estimation support subsystem determines whether an estimation answer firm and an estimation reception firm belong to the same country. If they belong to different countries, the trading cost calculation subsystem automatically calculates tax, carriage and insurance premium incurred in a trading transaction to provide the calculation results as reference information which in turn is added to estimation information and registered. During purchase order, the EDI (electronic Data Interchange) subsystem determines whether an order sending firm and an order receiving firm belong to the same country. If they belong to different countries, the workflow subsystem automatically prepares and registers workflow information concerning trading business in respect of the purchase order information and carries out status management of trading operations on the basis of the prepared workflow. The trading document preparation subsystem automatically prepares and registers trading document information necessary for operations defined on the workflow in respect of the purchase order information. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0006]    [0006]FIG. 1 is a diagram for explaining the function and construction of a central commerce server according to an embodiment of the invention.  
         [0007]    [0007]FIG. 2 is a diagram for explaining the connection relation in the overall construction of an electronic commerce system according to the embodiment of the invention.  
         [0008]    [0008]FIG. 3 is a flow chart showing a business process in the central commerce server according to the embodiment of the invention.  
         [0009]    [0009]FIG. 4 is a flow chart showing a business process in a global table management subsystem according to the embodiment of the invention.  
         [0010]    [0010]FIG. 5 is a flow chart showing a business process in an estimation support subsystem according to the embodiment of the invention.  
         [0011]    [0011]FIG. 6 is a flow chart showing a business process in a trading cost calculation subsystem according to the embodiment of the invention.  
         [0012]    [0012]FIG. 7 is a flow chart showing a business process in an EDI subsystem according to the embodiment of the invention.  
         [0013]    [0013]FIG. 8 is a flow chart showing a business process in a workflow subsystem according to the embodiment of the invention.  
         [0014]    [0014]FIG. 9 is an image diagram visualizing part of the business process in the workflow subsystem.  
         [0015]    [0015]FIG. 10 is a flow chart showing a business process in a trading document preparation subsystem according to the embodiment of the invention.  
         [0016]    [0016]FIG. 11 is an image diagram visualizing part of the business process in the trading document preparation subsystem.  
         [0017]    [0017]FIG. 12 is a flow chart showing a business process in a user table management subsystem according to the embodiment of the invention. 
     
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS  
       [0018]    Embodiments of the present invention will be described hereunder by way of electronic commerce system for trading operation with reference to the acfirming drawings.  
         [0019]    Referring now to FIG. 1, there is illustrated a fundamental construction diagram of a central commerce server, taking a leading part in the electronic commerce system for trading operation, according to an embodiment of the invention. A central commerce server, generally designated by reference numeral  1 , comprises seven subsystems which include an estimation support subsystem  10 , a trading cost calculation subsystem  20 , an EDI (Electronic Data Interchange) subsystem  30 , a workflow subsystem  40 , a trading document preparation subsystem  50 , a user table management subsystem  60  and a global table management subsystem  70 .  
         [0020]    The estimation support subsystem  10  is provided with two databases including an inquiry DB (Database)  11  for managing inquiry information registered by a user and an estimation DB  12  for managing estimation answer information (information on answer to inquiry) registered by a user other than the inquiry information registering user in association with the inquiry information.  
         [0021]    The trading cost calculation subsystem  20  is provided with a cost information DB  21  adapted to automatically calculate, register and manage trading costs when an estimation answer to the inquiry information is originated from an overseas client.  
         [0022]    The EDI subsystem  30  is provided with an EDI DB  31  for managing purchase order data registered by a user.  
         [0023]    The workflow subsystem  40  is provided with a workflow DB  41  adapted to automatically prepare, register and manage a workflow concerning trading procedures when the purchase order data registered in the EDI subsystem  30  stems from an overseas transaction.  
         [0024]    The trading document preparation subsystem  50  is provided with a trading document DB  51  adapted to prepare, register and manage trading related documents corresponding to individual business procedures on the workflow concerning the purchase order data prepared by the workflow subsystem when the purchase order data registered in the EDI subsystem stems from an overseas transaction.  
         [0025]    The user table management subsystem  60  is provided with a product information management table  61  for managing product information in respect of individual clients and a customer information management table  62  for managing detailed information concerning users.  
         [0026]    The global table management sub-system  70  is provided with a carriage information management table  71  for managing carriage information depending on country, weight, capacity and product, a tax information management table  72  for managing tax information depending on country and product, an insurance premium information management table  73  for managing insurance premium depending on country, product and sum, a workflow management table  74  for managing workflow parts concerning trading service, a trading document management table  75  for managing worksheet information of various kinds of trading documents in the trading service, and a common item management table  76  for managing related information of items used in common in the worksheets of the various trading documents.  
         [0027]    Referring to FIG. 2, there is illustrated an image diagram of the whole of the electronic commerce system for trading operation. A leading part of this system is the central commerce server  1  connected to an IP-VPN (Internet Protocol Based Virtual Private Network)  800  constructed on an internet  80 . The central commerce server  1  is connected to the IP-VPN  800  through a VPN router  830  to permit communication of high security on the internet  80 . If, in this case, communication security can be maintained by upper layer protocol such as SSL (Secure Socket Layer), then the virtual private network can be constructed without causing the central commerce server to route through the VPN router  830 . Terminals of custom, chamber of commerce, carrier, shipper, insurance firm, bank, buyer and seller are all connected to the central commerce server by way of the IP-VPN  800 .  
         [0028]    The custom terminal  820  is connected to the IP-VPN  800  through a VPN router  810  so as to be accessible to subsystems for various users possessed by the central commerce server  1 . If, in this case, communication security can be maintained by the upper layer protocol such as SSL as in the case of the central commerce server  1 , then the virtual private network can be constructed without causing the custom terminal to route through the VPN router  810 .  
         [0029]    The terminal of chamber of commerce  821  is connected to the IP-VPN  800  through a VPN router  811  so as to be accessible to the subsystems for various users possessed by the central commerce server  1 . If, in this case, communication security can be maintained by the upper layer protocol such as SLL as in the case of the central commerce server  1 , then the virtual private network can be constructed without causing this terminal to route through the VPN router  811 .  
         [0030]    The carrier terminal  822  is connected to the IP-VPN  800  through a VPN router  812  so as to be accessible to the subsystems for various users. If, in this case, communication security can be maintained by the upper layer protocol such as SSL as in the case of the central commerce server  1 , then the virtual private network can be constructed without causing this terminal to route through the VPN router  812 .  
         [0031]    The shipper terminal  823  is connected to the IP-VPN  800  through a VPN router  813  so as to be accessible to the subsystems for various users possessed by the central commerce server. If, in this case, communication security can be maintained by the upper layer protocol such as SSL as in the case of the central commerce server, then virtual private network can be constructed without causing this terminal to route through the VPN router  813 .  
         [0032]    The insurance firm terminal  824  is connected to the IP-VPN  800  through a VPN router  814  so as to be accessible to the subsystems for various users processed by the central commerce server. If communication security can be maintained by the upper layer protocol such as SSL as in the case of the central commerce server  1 , then the virtual private network can be constructed without causing this terminal to route through the VPN router  814 .  
         [0033]    The bank terminals  825  and  826  are connected to the IP-VPN  800  through VPN routers  815  and  816 , respectively, so as to be accessible to the subsystems for various users processed by the central commerce server. If communication security can be maintained by the upper layer protocol such as SSL as in the case of the central commerce server  1 , then the virtual private network can be constructed without causing these terminals to route through the VPN routers  815  and  816 , respectively.  
         [0034]    The buyer terminals  841  and  842  are connected to the IP-VPN  800  through VPN routers  831  and  832 , respectively, so as to be accessible to the subsystems for various users processed by the central commerce server. If communication security can be maintained by the upper layer protocol such as SSL as in the case of the central commerce server  1 , then the virtual private network can be constructed without causing these terminals to route through the VPN routers  831  and  832 , respectively.  
         [0035]    Seller terminals  843  and  844  are connected to the IP-VPN  800  through VPN routers  833  and  834 , respectively, so as to be accessible to the subsystems for various users possessed by the central commerce server  1 . If communication security can be maintained by the upper layer protocol such as SSL as in the case of the central commerce server  1 , then the virtual private network can be constructed without causing these terminals to route through the VPN routers  833  and  834 , respectively.  
         [0036]    Referring to flow charts shown in FIGS.  3  to  8 ,  10  and  12  and image diagrams shown in FIGS. 9 and 10, a concrete business processing method in the central commerce server will be described.  
         [0037]    A business processing flow in the central commerce server is shown in FIG. 3.  
         [0038]    In step  2 , the central commerce server  1  receives inputs of access request and user ID from the various user terminals connected through the IP-VPN  800 .  
         [0039]    In step  3 , a user ID inputted in the step  2  is determined. As will be conceivable easily, for determination of the user ID, utilizing a known technique of electronic authentication, cryptograph or password to enhance security can do user authentication.  
         [0040]    If the user ID is a general user ID indicative of a buyer or a seller, a user menu is displayed and an input of menu selection is received from the user through the IP-VPN  800  in step  4 .  
         [0041]    If the user ID is an ID for system manager such as administrator, the program proceeds to a business process of global table management system in step  70 .  
         [0042]    In step  5 , the user menu inputted in the step  4  is determined.  
         [0043]    When the user menu selected by the general user is estimation service, the program proceeds to a business process of estimation support system in step  10 .  
         [0044]    When the user menu selected by the general user is order acceptance/order service, the program proceeds to a business process of EDI table management subsystem in step  30 .  
         [0045]    When the user menu selected by the general user is master table editing, the program proceeds to a business process of user table management subsystem in step  60 .  
         [0046]    After the business process in each subsystem for users have been finished, an end decision input concerning the service for user is received from the general user terminal in step  6 .  
         [0047]    If, in step  7 , data decided in the step  6  is determined as continuing the business process, the program returns to the user menu selection reception (step  4 ) but if the data indicates end, the process in the central commerce server ends.  
         [0048]    Referring to FIG. 4, there is illustrated a business processing flow in the global table management subsystem.  
         [0049]    In step  700 , the global table management system  70  receives an input of edition target DB from a user who is logged in with an ID for the system manager. In this case, access from the user may be accomplished by either remote access by way of the IP-VPN  800  or access from a console directly connected to the central commerce server  1 .  
         [0050]    Subsequently, in step  701 , the inputted addition target DB is determined.  
         [0051]    If the edition target DB is the carriage information management table, the carriage information table  71  which is put in order according to indexes such as country, product field, weight, capacity, distance, transport means and effective period is laid open to the user, operations for new registration, update, reference and deletion of the indexes and carriage data are received and the carriage information management table  71  is updated on the basis of the inputted data in step  710 .  
         [0052]    If the editing target DB is the tax information management table, the tax information management table  72  which is put in order according to indexes such as country, product field, sum and tax kind is laid open to the user, operations for new registration, update, reference and deletion of the indexes and tax data are received and the tax information table  72  is updated on the basis of the inputted data in step  720 .  
         [0053]    If the edition target DB is the insurance premium information management table, the insurance premium information management table  73  which is put in order according to indexes such as country, product field, sum, distance, transport means, Incoterms and effective period is laid open to the user, operations for new registration, update, reference and deletion of the indexes and insurance premium data are received and the insurance premium information management table  73  is updated on the basis of the inputted data in step  730 .  
         [0054]    If the edition target DB is the workflow management table, the workflow management table  74  for registering/ managing a workflow model which is put in order according to indexes such as country, product field and trading pattern, and workflow parts, in which target dealers and necessary preparation documents are put in order according to trading pattern, is laid open to the user, operations for new registration, update, reference and deletion of the workflow model and workflow parts are received and the workflow management table  74  is updated on the basis of the inputted data in step  740 .  
         [0055]    If the edition target DB is the trading document management table, the trading document management table  75  for managing various kinds of trading document worksheets which are put in order according to indexes such as country, product field and trading pattern is laid open to the user, operations for new registration, update, reference and deletion of the trading document worksheets are received, and the trading document management table  75  is updated on the basis of the inputted data in step  750 .  
         [0056]    If the edition target DB is the common item management table, the common item management table  76  for managing common item related information corresponding to individual items in the various trading documents worksheets managed by the trading document management table  75  is laid open to the user, operations for new registration, update, reference and deletion of the common item related information are received, and the common item management table  76  is updated on the basis of the inputted data in step  760 .  
         [0057]    It will be realized that the trading document management table  75  can be related to the common item management table  76  with ease by using known techniques, for example, a definition method of DTD (Data Type Definition) in XML (Extensible Markup Language).  
         [0058]    After the edition of the DB has ended, an input of end decision is received from the user terminal in step  702 .  
         [0059]    In step  703 , the input from the user is determined and if the process is determined to continue, the program returns to the step  701  of edition target DB determination in which another table editing is carried out successively but if the process end is determined, the process in the global table management subsystem ends.  
         [0060]    Referring to FIG. 5, there is illustrated a business processing flow in the estimation support subsystem.  
         [0061]    In step  100 , the estimation support subsystem  10  receives an input of operation menu selection from a general user terminal through the IP-VPN  800 .  
         [0062]    The operation menu inputted from the user terminal is determined in step  110 . In case the operation menu is inquiry update, new registration, update and reference of inquiry information are received from the user terminal, and the inquiry DB  11  is updated in step  120  on the basis of the input data. After completion of the update process, the program proceeds to the step  6  in which the central commerce server receives an input of end decision.  
         [0063]    If the operation menu is an estimation answer (an answer to estimation), an input of the estimation answer is received from the user terminal in step  130 .  
         [0064]    The customer information management table  62  is retrieved on the basis of the logged-in user ID, and from information specific to an-estimation answer firm registered in the customer management table, information of a country to which the firm belongs is extracted in step  140 .  
         [0065]    Then, in step  150 , matching between a country to which a firm receiving the estimation answer and the information of a country to which the firm sending the estimation answer firm belongs is examined. The matching is executed as below.  
         [0066]    Firstly, when estimation is requested from a computer of a first firm, a country to which the first firm belongs is identified. For this identification, user identifiers corresponding to computers of a plurality of firms and the correspondence relation of countries to which the firms belong with the user identifiers are held and as a user identifier is inputted from a computer of the first firm, a country to which the first firm belongs may be identified on the basis of the inputted user identifier and held information.  
         [0067]    When an answer of the estimation is made from a computer of a second firm, a country to which the second firm belongs is identified. For this identification, user identifiers corresponding to computers of a plurality of firms and the correspondence relation of countries to which the firms belong with the user identifies are held and as a user identifier is inputted from a computer of the second firm, a country to which the second firm belongs may be identified on the basis of the inputted user identifier and held information.  
         [0068]    When the firm receiving the estimation answer coincides with the information of the country to which the estimation answer sending firm belongs, the estimation DB  12  is updated in step  160  on the basis of the estimation data inputted from the user terminal in the step  130  of estimation answer input reception. After completion of the update processing, the program proceeds to the step  6  of end decision input reception by the central commerce server.  
         [0069]    When the firm receiving the estimation answer is not coincident with the information of the country to which the estimation answer sending firm belongs, the inquiry DB  11  is retrieved in step  170  by using an inquiry code as a key to extract details of the inquiry information.  
         [0070]    If details of the inquiry information are determined to exist in step  180 , the program proceeds to a business processing in the trading cost calculation subsystem.  
         [0071]    In case the details of the inquiry information do not exist on the inquiry DB  11 , the estimation DB  12  is updated in step  190  on the basis of the estimation data inputted from the user terminal in the step  130  of estimation answer input reception. After the update process has been finished, the program proceeds to the step  6  of end decision input reception by the central commerce server.  
         [0072]    Referring to FIG. 6, there is illustrated a business process flow in the trading cost calculation subsystem.  
         [0073]    In step  200 , the trading cost calculation subsystem  20  retrieves the carriage information management table  71  on the basis of the inquiry detailed information acquired through the inquiry DB retrieval (step  170 ) by using, as a key, the country information, product field information, weight information, capacity information, distance information or transport means information.  
         [0074]    If, in step  201 , carriage information corresponding to the carriage information management table  71  does not exist, the program proceeds to the next process.  
         [0075]    In the presence of the carriage information corresponding to the carriage information management table  71 , the carriage depending on country, product field, weight, capacity, distance and transport means is calculated in step  202 .  
         [0076]    In step  210 , the trading cost calculation subsystem  20  retrieves the tax information management table  72  on the basis of the inquiry detailed information acquired in the inquiry DB retrieval  170  and the estimation answer information inputted by the user in the estimation answer input reception  130  by using, as a key, country information, product field information or estimation answer fee information.  
         [0077]    If corresponding tax information does not exist in the tax information management table  72  in step  211 , the program proceeds to the next process.  
         [0078]    In the presence of the corresponding tax information in the tax information management table  72 , tax information depending on country, product field, sum or tax field is calculated in step  212 .  
         [0079]    In step  220 , the trading cost calculation subsystem  20  retrieves the insurance premium information management table  73  on the basis of the inquiry detailed information acquired in the inquiry DB retrieval  170  and the estimation answer information inputted by the user in the estimation answer input reception  130  by using, as a key, country information, product field information, estimation answer fee information, distance information, transport means information or Intercoms information.  
         [0080]    If corresponding insurance premium information does not exist in the insurance premium information management table  73  in step  221 , the program proceeds to the next process.  
         [0081]    In the presence of the corresponding insurance premium information in the insurance premium management table  73 , tax information depending on country, product field, sum, distance, transport mean and Intercoms is calculated in step  222 .  
         [0082]    Carriage information calculated in the country/product dependent carriage calculation  202 , tax information calculated in the country/product dependent tax calculation  212  and insurance premium information calculated in the country/product dependent insurance premium calculation  222  are merged to prepare estimation reference information in step  230 .  
         [0083]    In step  231 , the estimation DB  12  is updated by attaching the estimation reference information prepared in the estimation reference information preparation  230  to the estimation answer information inputted by the user in the estimation answer input reception  130 . After completion of the update process, the program proceeds to the end decision input reception  6  by the central commerce server.  
         [0084]    Referring to FIG. 7, there is illustrated a business processing flow in the EDI subsystem.  
         [0085]    In step  300 , the EDI subsystem  30  receives an input of purchase order data from a user terminal such as buyer terminal  841  or  842  through the IP-VPN  800 .  
         [0086]    In step  310 , the EDI DB  31  is updated on the basis of the purchase order data inputted in the order data input reception  300 .  
         [0087]    In step  320 , the customer information management table  62  is retrieved by using the logged-in user ID as a key to extract country information to which an order sending firm belongs and the customer information management table  62  is also retrieved by using, as a key, an order receiving firm code on the purchase order data to extract country information to which the order receiving firm belongs.  
         [0088]    Matching between the country information of a country to which the order sending firm belongs, retrieved in the order receiving firm determination  320 , and the information of a country to which the order receiving firm belongs, also retrieved in the order receiving firm determination  320 , is examined in step  330 . If the purchase order process is carried out between identical counties, the program proceeds to the end decision input reception  6  by the central commerce server. If the order transaction is carried out between different countries, the program proceeds to a business process in the workflow subsystem  40 .  
         [0089]    Referring to FIG. 8, there is illustrated a business processing flow in the workflow subsystem.  
         [0090]    In step  400 , the workflow subsystem  40  retrieves the customer information management table  62  by using, as a key, the order sending firm code and the order receiving firm code to extract customer information of the order sending firm and the order receiving firm.  
         [0091]    It is determined in step  410  whether a designated dealer during import service is registered in the customer information of the order sending firm and a designated dealer during export service is registered in the customer information of the order receiving firm.  
         [0092]    If both the order sending firm and the order receiving firm have registered the designated dealers, a reference workflow is prepared on the basis of that information and is registered in the workflow DB  41  by using the order code as a key in step  420 . After completion of the registration, the program proceeds to a business process in the trading document preparation subsystem.  
         [0093]    If the designated dealer has not been registered in at least one of the order sending firm and the order receiving firm, the workflow management table  74  is retrieved by using, as a key, importing country information and product field information and exporting country information and product field information in step  430  to extract recommended workflow information which has already been registered by the system manager.  
         [0094]    Import firm recommended workflow information and export firm recommended information, extracted in the workflow information retrieval  430 , are merged to prepare reference workflow information which in turn is registered in the workflow DB  41  in step  440 . After completion of the registration, the program proceeds to the business process in the trading document preparation subsystem  50 .  
         [0095]    Referring to FIG. 9, there is illustrated a business processing image in the workflow subsystem.  
         [0096]    Managed by the workflow management table  74  are recommended workflow data in export business as shown at  441  which are classified according to country and product field and recommended workflow data in import business as shown at  432  which are classified according to country and product field.  
         [0097]    Export workflow data is definitely specified as shown at  441  from the workflow management table  74  by using the country code or the product field code as a key by way of the recommended workflow data in export business depending on country shown at  431 . Similarly, import workflow data is definitely specified as shown at  442  from the workflow management table  74  by using the country code or the product field code as a key by way of the recommended workflow data in import business depending on country shown at  432 . The workflow data specified in sections  441  and  442  are merged to prepare reference workflow data which in turn is registered in the workflow DB by using the order code as a key. On the basis of the workflow information registered in the workflow DB  41 , the workflow subsystem makes a request to related dealers and related government offices for operation, thereby permitting management of workflow. The order sending firm and the order receiving firm can make reference to the workflow information through the IP-VPN  800  and the recommended dealers on the workflow can be changed by the order sending firm and the order receiving firm. It is easily conceivable that the business process as above can be implemented by using known technique for workflow management.  
         [0098]    Referring to FIG. 10, there is illustrated a business processing flow in the trading document preparation subsystem.  
         [0099]    In step  500 , the trading document preparation subsystem  50  retrieves the product information management table  61 , on the basis of the purchase order data inputted from the buyer terminal in the order data input reception  300 , by using the ordered product information on the purchase order data as a key to extract the product information.  
         [0100]    Product field information of the ordered product is extracted from the product information extracted in the ordered product inquiry  500 . Besides, necessary trading document information is extracted from service information defined on the workflow prepared in the workflow subsystem  40 . In step  510 , the trading document management table  75  is retrieved by using, as a key, the country information of the order sending firm and the order receiving firm, the extracted product field information and the extracted necessary trading document information to extract a worksheet of the trading document.  
         [0101]    If the worksheet of the trading document is not determined to be present in step  520 , the business process in the trading document preparation subsystem  50  ends and the program proceeds to the process of end decision input reception  6  by the central commerce server  1 .  
         [0102]    In the presence of the worksheet of the trading document, the program proceeds to step  530  in which individual item data in the purchase order data are converted into item columns defined on the worksheet by making reference to the common item management table  76 .  
         [0103]    The process of order data conversion  530  is carried out for all trading document worksheets in question to prepare, in step  540 , trading documents different for countries/products defined on the workflow for the purchase order data.  
         [0104]    The trading document data prepared differently for countries/products in the step  540  are registered in the trading document DB  51  in step  550  by using, as a key, the order code and a trading document name. After completion of the registration, the business process in the trading document preparation subsystem  50  ends and the program proceeds to the end decision input reception  6  by central commerce server  1 .  
         [0105]    Referring to FIG. 11, there is illustrated a business processing image in the trading document preparation subsystem.  
         [0106]    Individual workflow data  501  for individual order processes are stored in the workflow DB  41  by using the order codes as a key. In each business process defined on each workflow data  501 , business process name, target dealer, target document name and service status are managed as business process information, as shown at  502 .  
         [0107]    The purchase order data is indicated at  503 . The product information management table  61  is retrieved by using, as a key, a product code registered in detailed data on the purchase order data to extract product field information of the order target product as shown at  504 .  
         [0108]    In respect of all trading documents defined on the workflow concerning the purchase order data, the trading document management table  75  is retrieved by using, as a key, the country code, product field and document name to extract worksheet information  521  of the corresponding document as shown at  511 .  
         [0109]    In respect of the worksheet information  521 , the common item management table  76  is retrieved by using, as a key, individual item tug information defined on the same worksheet and matching is examined, as shown at  532 , between the retrieved data and information related to data item defined on the purchase order data  503 , so that convertible data is converted into concrete data on the worksheet information.  
         [0110]    Then, as shown at  541 , the purchase order data  503  extracted in  511  is converted onto the worksheet to automatically prepare necessary trading document data which is in turn registered in the trading document DB  51  by using, as a key, the order code and the trading document name, as shown at  541 .  
         [0111]    If, in this case, necessary items of the necessary trading document are not filled up with the purchase order data or the data defined on the common item management table, it is automatically detected that the document is incomplete, with the result that a dealer required to prepare an original document defined on the workflow concerning the order data can be requested to input necessary items by using the function of, for example, agent function through the use of the known function of workflow or agent software.  
         [0112]    Referring to FIG. 12, there is illustrated a business processing flow in the user table management subsystem.  
         [0113]    In step  600 , the user table management subsystem  60  receives a selection input for the edition target DB from a general user terminal through the IP-VPN  800 .  
         [0114]    The edition target DB inputted from the general user terminal is determined in step  601 .  
         [0115]    If the edition target DB is the product information management table  61 , definition inputs of detailed information such as product code, product name, product field, weight, capacity, size and specifications are received in respect of product information of each user firm in question and in step  610 , the product information management table  61  is updated on the basis of such a process selected by the user as new registration, update, inquiry or deletion.  
         [0116]    If the edition target DB is the customer information management table  62 , inputs of information such as firm name, location, director organization, management information and business field are received for each user firm in question and in step  620 , the customer information management table  62  is updated on the basis of such a process selected by the user as new registration, update, inquiry or deletion. Then, in step  602 , an input of end decision is received from the general user terminal.  
         [0117]    If, in step  603 , the end decision is determined as continuing the process, the program returns to the edition target DB input reception  600  but in the case of the process end, the business process in the user table management subsystem  60  ends and the program proceed to the end decision input reception  6  by central commerce server  1 .  
         [0118]    According to the present invention, a trading service can be carried out for a user who performs an electronic transaction on the closed virtual commerce space in a way similar to a domestic transaction and in the case of a trading transaction, by virtue of the trading operation supporting function presented by the trading cost calculation subsystem, the workflow subsystem and the trading document preparation subsystem, the user can confirm the execution of transaction and additional expenditure without being conscious of the trading procedures.