the present system is most readily realized in a network communications system . a high level block diagram of an exemplary network communications system 100 is illustrated in fig1 . the illustrated system 100 includes one or more client devices 102 , one or more web servers 106 , and one or more databases 108 . each of these devices may communicate with each other via a connection to one or more communications channels 110 such as the internet or some other wired and / or wireless data network , including , but not limited to , any suitable wide area network or local area network . it will be appreciated that any of the devices described herein may be directly connected to each other instead of over a network . the web server 106 stores a plurality of files , programs , and / or web pages in one or more databases 108 for use by the client devices 102 as described in detail below . the database 108 may be connected directly to the web server 106 and / or via one or more network connections . the database 108 stores data as described in detail below . one web server 106 may interact with a large number of client devices 102 . accordingly , each server 106 is typically a high end computer with a large storage capacity , one or more fast microprocessors , and one or more high speed network connections . conversely , relative to a typical server 106 , each client device 102 typically includes less storage capacity , a single microprocessor , and a single network connection . a more detailed block diagram of the electrical systems of a computing device ( e . g ., client device 102 and / or server 106 ) is illustrated in fig2 . although the electrical systems of a client device 102 and a typical server 106 may be similar , the structural differences between the two types of devices are well known . the client device 102 may include a personal computer ( pc ), a personal digital assistant ( pda ), an internet appliance , a cellular telephone , or any other suitable communication device . the client device 102 includes a main unit 202 which preferably includes one or more processors 204 electrically coupled by an address / data bus 206 to one or more memory devices 208 , other computer circuitry 210 , and one or more interface circuits 212 . the processor 204 may be any suitable processor . the memory 208 preferably includes volatile memory and non - volatile memory . preferably , the memory 208 stores a software program that interacts with the other devices in the system 100 as described below . this program may be executed by the processor 204 in any suitable manner . the memory 208 may also store digital data indicative of documents , files , programs , web pages , etc . retrieved from a server 106 and / or loaded via an input device 214 . the interface circuit 212 may be implemented using any suitable interface standard , such as an ethernet interface and / or a universal serial bus ( usb ) interface . one or more input devices 214 may be connected to the interface circuit 212 for entering data and commands into the main unit 202 . for example , the input device 214 may be a keyboard , mouse , touch screen , track pad , track ball , isopoint , and / or a voice recognition system . one or more displays , printers , speakers , and / or other output devices 216 may also be connected to the main unit 202 via the interface circuit 212 . the display 216 may be a cathode ray tube ( crts ), liquid crystal displays ( lcds ), or any other type of display . the display 216 generates visual displays of data generated during operation of the client device 102 . for example , the display 216 may be used to display web pages and / or desktop pop - up data received from the server 106 . the visual displays may include prompts for human input , run time statistics , calculated values , data , etc . one or more storage devices 218 may also be connected to the main unit 202 via the interface circuit 212 . for example , a hard drive , cd drive , dvd drive , and / or other storage devices may be connected to the main unit 202 . the storage devices 218 may store any type of data used by the client device 102 . the client device 102 may also exchange data with other network devices 220 via a connection to the network 110 . the network connection may be any type of network connection , such as an ethernet connection , digital subscriber line ( dsl ), telephone line , coaxial cable , etc . users 114 ( e . g ., end - users and / or configuration users ) of the system 100 may be required to register with the server 106 . in such an instance , each user 114 may choose a user identifier ( e . g ., e - mail address ) and a password which may be required for the activation of services . the user identifier and password may be passed across the network 110 using encryption built into the user &# 39 ; s browser . alternatively , the user identifier and / or password may be assigned by the server 106 . a flowchart of an example process 300 for maintaining businesses rules in a configuration system is illustrated in fig3 . preferably , the process 300 is embodied in one or more software programs which is stored in one or more memories and executed by one or more processors . although the process 300 is described with reference to the flowchart illustrated in fig3 , it will be appreciated that many other methods of performing the acts associated with process 300 may be used . for example , the order of many of the steps may be changed , and many of the steps described are optional . in general , the process 300 allows systems to be configured using a plurality of attributes and rules that are syndicated by a plurality of different manufactures . the process 300 preferably begins with a plurality of manufacturers syndicating their respective attributes and / or configuration rules ( block 302 ), which are then received by one or more sales channels ( e . g ., cdw ) ( block 304 ). for example , hp may publish one rule that says their model hp - 1 computer must be configured with at least 2 gb of ram if you want to use the nvidia g1 graphics card and another rule that says their model hp - 2 computer must be configured with at least 4 gb of ram if you want to use the nvidia g1 graphics card . similarly , dell may publish one rule that says their model d - 1 computer must be configured with at least 4 gb of ram if you want to use the nvidia g1 graphics card and another rule that says their model d - 2 computer is never compatible with the nvidia g1 graphics card no matter how much ram is installed . in addition , cdw may write certain rules regarding the compatibility of certain system attributes from various manufactures such as hp and dell . these attributes and business rules may be any type of business rule and may apply to things that are not systems or products . for example , the business rules may be bill of materials ( bom ) rules , pricing rules , hiding rules , recommendation rules , constraint rules , recommended items rules , etc . for each configuration , the end - user can create a bill of materials . when a bom rule triggers , it appears to the end - user ( e . g ., buyer ) on a commerce document line item pages . pricing rules may be used to calculate a price based on how a product is configured . the designer can create a smart pricing system by generating business rules for configurable attributes that add pricing to products . pricing rules can be based on a combination of one or more configured values . hidden attribute rules tell the system to hide certain attributes when a pre - defined condition is met . using hidden attribute rules , the designer can reduce the number of rules needed for a configuration process because the designer can include disparate attribute types in a single flow rule and how one set of attributes or another based on some condition . recommendation rules can be used to help end - users configure products by offering suggested attributes values . for each configuration , where a model or part would likely have a certain attribute value , the designer can create a recommendation . when recommendations trigger , they preferably appear to end - users . for example , the recommendation may display as text next to a configurable attribute that has a recommended value . for attributes with a set or forced option enabled , recommendation values automatically auto - populate the configurable attribute fields . constraint rules are set - up to warn an end - user when a certain attribute value will not work in a configuration . these rules may be used to reduce errors in the configuration process . for example , if the end - user is configuring an automobile and the end - user selects a blue exterior color , a constraint may run that only allows the end - user to select tan as an interior color . while a constraint is active , the system typically does not allow the end - user to advance to commerce ( e . g ., a purchase screen ). recommended item rules enable a designer to associate extra sets of parts and models with products based on user - configured values . if the recommended item is mandatory , then the end - user must select ( e . g . purchase ) the configured model with the recommended item . preferably , there is no way to delete the item association in the commerce process . if the item is not mandatory , then the end - user can opt to not buy the recommended item . preferably , the business rules ( e . g ., system configuration rules ) are stored as a plurality of if - then statements relating certain attributes to other attributes . for example , “ if brand =‘ dell ’ and model =‘ d - 2 ’ then nvidiabrand =‘ no ’. these if - then statements are then used when the configuration software is executed ( block 306 ). for example , an end - user may go to a web site 400 to configure a computer ( see fig4 ). during the configuration the end - user enters a plurality of configuration attributes ( block 308 ). for example , the end - user may select a dell brand computer ( via drop - down box 402 ), model d - 1 ( via drop - down box 404 ), with a 4 gb of ram ( via drop - down box 406 ). it will be appreciated that any suitable input mechanism may be used such as check boxes , radio buttons , etc . the product is interactively configured based on the selected configuration attributes and configuration rules ( block 310 ). for example , if the end - user selected a dell model d - 1 with 4 gb of ram , one of the available graphics cards may be the nvidia g1 . accordingly , the nvidia g1 is one of the choices available for selection in the graphics card drop - down box 408 . non - selectable choices may be excluded ( e . g ., not included in the drop - down box ) or included ( e . g ., dimmed and not selectable ). if the end - user changes a choice in one drop - down box , the other drop - down boxes may also change based on a business rules table and the corresponding if - then statements relating certain attributes to other attributes . for example , if the end - user changes from a 4 gb of ram to 8 gb of ram , additional video cards may become available . in another example , one attribute selection may require another attribute selection . for example , one computer part may require another computer part for installation . in such an instance , the configuration software preferably enforces this relationship for the end - user . these attributes and or rules may be provided by each manufacturer and / or a configuration user such as the sales channel . for example , a retail channel may provide a rule relating the compatibility of one manufacturer &# 39 ; s product to another manufacturer &# 39 ; s product . once the end - user &# 39 ; s selections are complete and the configuration rules are satisfied , a proposal , quote , contract , and / or specification associated with the system may be automatically generated , and / or the system may be built in accordance with the selected configuration parameters ( block 312 ). for example , the computer may be assembled ( or selected from inventory ) and delivered to the customer . in summary , persons of ordinary skill in the art will readily appreciate that methods and apparatus for maintaining businesses rules in a configuration system have been provided . the foregoing description has been presented for the purposes of illustration and description . it is not intended to be exhaustive or to limit the invention to the exemplary embodiments disclosed . many modifications and variations are possible in light of the above teachings . it is intended that the scope of the invention be limited not by this detailed description of examples , but rather by the claims appended hereto .