《系统工程》课程教学资源（英文文献）Resource Modeling of Logistic Grid System Based

Proceedings of the IEEEInternational Conference on Automation and LogisticsAugust 18-21,2007, Jinan, ChinaResource Modeling of Logistic Grid System Basedon XMLXiu-xu Zhao, Fei Tao, Ye-fa Hu and Zu-de ZhouSchool of Mechanical and Electrical EngineeringWuhan University of TechnologyWuhan,Hubei,430070,Chinazhaoxiuxu@mail.whut.edu.cnAbstractAs a kind of information technology,Grid provides theTheLogistic ResourcesInformation(LRI) is the keyway for the distributing and heterogeneous resources"component of Logistic Management System (LMS), which issharing.Grid can be applied in logisticsystem bydistributed and dynamic. But the LMS established with theencapsulating and integrating them in different correspondingtraditional modeling method is unable to ideally describe theresources templates, and then users can use all resources inLRI, and can't support the resources information's serviceinLGS as conveniently as they use local resources. All of whichnetwork environment. Hence, a new method of LRI modelingis a kind of realization of sharing in various resourcesbased on XML is put forward. Firstly,establish the logisticincludingmaterialresources,informationresources,resourcesconceptualmodel(LRCM)byabstractingthetechniqueresources,etccorrelative conceptions and characters of a logistic resource.The paper analyses the basic characteristics of logisticsSecondly,establish corresponding oriented-objectUMLmodel ofLRI acordingtoLRCMandcorrespondingmappingresource management within network and presents themechanism from LRCM to UML.Thirdly,establish the uniformcomparability of the logistics networks and the Grid, designslogistic resources information'sXMLSchema,whichis suitablethe architecture of logistics grid system and bring outfor Internet sharing by researching and setting down mappingresource modeling based on XML. Technical levels in themechanism fromUMLdatumtoXMLSchema.Atlast, establishsystem include resource providing level, grid middleware andXML information model used to LRI according to theresource applying level. The resources' sharing can beestablished XML Schema.The represented methodof LRIrealized via specific resource management structure andmodeling breaksdown thetraditional logistic resourcesresource schedule planning.Themember of the system canmodeling limitation that the majorityis an integral frameworkobtainthecorrespondingcapabilitywithrelevantin content. It is partial for the description of the logisticresource's lack of concrete description and research aboutqualification.resource's data model and resource's processing capability. TheIIRELATEDWORKSresult of experimentation proves that the established LRIM cansupportthedatumexchangingandsharingamongWith the presenting one after the other of various advancedheterogeneous systems under the Internet environments.manufacturing model, more and more scholars recognizethatthe integration of MRI is the foundation of the integration ofKey words: Logistic Grid System (LGS), Resourc Modeling,product processing. Therefore, many scholars have doneLogisticResource,UML,XMLSchemaresearch on the modeling of MRI to various advancedIINTRODUCTIONmanufacturing model from different perspective.capability model framework and aprocesscapability modelwas respectively put forward by Feng[1], Kjiellbeg[2]Aconstraint model of manufacturing resources,a simpleMRIMbasedonSTEP,aproduct and manufacturingGao[3], and Case[4], Shao Xinyu [5], Song Yuyin[6] et al.management with network manufacturing and presents theThe logistics resource management within network dependscomparability of the logistics networks and the Grid,designson the resource sharing and the cooperation with differentthe architectureof logistics grid system[9].LONGYun-junorganizations.Logisticsystempresentsdiverseintroduced virtual logistics and the resource distribution ofcharacteristics, and the key is the integration of the distributedvirtual logistics enterprises,studies the virtual logisticslogisticresourcesresource distribution with grid technology, established aYan Bo indicated the application demands of grids in science,hierarchy system structure of virtual logistics resourcegovernment,entertainment，education ，business andgrid[10].The emphasis of above research lay in themanufacturing ,and discussed NetManGrid, which is anestablishment of resourcesmodelwhichlack the concreteapplication system including many business grids such as thedescription and investigation toward the resources data modellogistics gridsale grid,customer gridpartner gridand resources processing capabilityAs far as the content ismanufacturing grid and design grid[7]. ZHANG Jin analyzedconcerned,the established logistic resource informationthe architecture of Logistics Information Grid [8].ZHOU Lemodel(LRIM)is inmost cases atotal framework, and onanalyzed the basic characteristics of logistics resourceoverall information facing the enterprise manufacturing1-4244-1531-4/07/S25.002007IEEE690

Resource Modeling of Logistic Grid System Based on XML Xiu-xu Zhao, Fei Tao, Ye-fa Hu and Zu-de Zhou School of Mechanical and Electrical Engineering Wuhan University of Technology Wuhan, Hubei, 430070, China zhaoxiuxu@mail.whut.edu.cn Abstract The Logistic Resources Information (LRI) is the key component of Logistic Management System (LMS), which is distributed and dynamic. But the LMS established with the traditional modeling method is unable to ideally describe the LRI, and can’t support the resources information’s servicein network environment. Hence, a new method of LRI modeling based on XML is put forward. Firstly, establish the logistic resources conceptual model (LRCM) by abstracting the correlative conceptions and characters of a logistic resource. Secondly, establish corresponding oriented-object UML model of LRI according to LRCM and corresponding mapping mechanism from LRCM to UML. Thirdly, establish the uniform logistic resources information’s XML Schema, which is suitable for Internet sharing by researching and setting down mapping mechanism from UML datum to XML Schema. At last, establish XML information model used to LRI according to the established XML Schema. The represented method of LRI modeling breaks down the traditional logistic resources modeling limitation that the majority is an integral framework in content. It is partial for the description of the logistic resource’s lack of concrete description and research about resource’s data model and resource’s processing capability. The result of experimentation proves that the established LRIM can support the datum exchanging and sharing among heterogeneous systems under the Internet environments. Key words: Logistic Grid System (LGS), Resourc Modeling, Logistic Resource, UML, XML Schema ҇ INTRODUCTION As a kind of information technology, Grid provides the way for the distributing and heterogeneous resources’ sharing. Grid can be applied in logistic system by encapsulating and integrating them in different corresponding resources templates, and then users can use all resources in LGS as conveniently as they use local resources. All of which is a kind of realization of sharing in various resources including material resources, information resources, technique resources, etc. The paper analyses the basic characteristics of logistics resource management within network and presents the comparability of the logistics networks and the Grid, designs the architecture of logistics grid system and bring out resource modeling based on XML. Technical levels in the system include resource providing level, grid middleware and resource applying level. The resources’ sharing can be realized via specific resource management structure and resource schedule planning. The member of the system can obtain the corresponding capability with relevant qualification. ҈ RELATED WORKS With the presenting one after the other of various advanced manufacturing model, more and more scholars recognize that the integration of MRI is the foundation of the integration of product processing. Therefore, many scholars have done research on the modeling of MRI to various advanced manufacturing model from different perspective. A constraint model of manufacturing resources, a simple MRIM based on STEP, a product and manufacturing capability model framework and a process capability model was respectively put forward by Feng[1], Kjiellbeg[2] Δ Gao[3], and Case[4], Shao Xinyu [5], Song Yuyin[6] et al. The logistics resource management within network depends on the resource sharing and the cooperation with different organizations. Logistic system presents diverse characteristics, and the key is the integration of the distributed logistic resources. Yan Bo indicated the application demands of grids in science, government , entertainment , education , business and manufacturing , and discussed NetManGrid, which is an application system including many business grids such as the logistics grid , sale grid , customer grid , partner grid , manufacturing grid and design grid[7]. ZHANG Jin analyzed the architecture of Logistics Information Grid [8]. ZHOU Le analyzed the basic characteristics of logistics resource management with network manufacturing and presents the comparability of the logistics networks and the Grid,designs the architecture of logistics grid system [9]. LONG Yun-jun introduced virtual logistics and the resource distribution of virtual logistics enterprises,studies the virtual logistics resource distribution with grid technology, established a hierarchy system structure of virtual logistics resource grid[10].The emphasis of above research lay in the establishment of resources model, which lack the concrete description and investigation toward the resources data model and resources processing capabilityAs far as the content is concerned, the established logistic resource information model(LRIM) is in most cases a total framework, and on overall information facing the enterprise manufacturing 1-4244-1531-4/07/$25.00 © 2007 IEEE. 690 Proceedings of the IEEE International Conference on Automation and Logistics August 18 - 21, 2007, Jinan, China

resources.However.thedetailedresourcesinformationaboutThirdly.dynamicresponding.ThesameasGridsystem,howmanufacturing activities is relatively insufficient.Thereply to the dynamic changing and assure the consistency ofestablished LRIM can't support the resourcedata exchangeservice is also the concerned problem in logistic systemand sharing among the heterogeneous systems under theDynamicis thefundamental characteristicof logistic,and itdetermines the diversity and uncertainty of logistic service.logisticgridenvironmentThe enter and exit of resource should be reply in time.TheI LOGISTIC GRID SYSTEM AND ITS ARCHITECTUREconsistencyof serviceistheobjectofrespondingtodynamicchanging, it means the service level have to be maintain forALogisticGrid System (LGS)userof logisticsystemThe origin of Grid came from electric power system, and itsC The architecture of logistic grid systempurpose is to provide service in the same way as the power inBased on the similarity of logistic system and Gridthe power network, regardless the service provider. Based onsystem, the architecture of logistic grid system can bestated technology protocols, Grid can integrate the resourceestablished, the related technology and methods of Gridwithin network; provide the extraordinary service in uncentralresource management can be used for referencecontrolled environment withthe collaborative utilization ofresources.ResourceThe grid system structure is the fundamental and critical, itLogisticLogisticLogisticProviderreflect thefundamental elements andfunction of Grid system.ResourceResourceResourceThe currently structuretypes:(1) Five layers sandglass architecture(5LSA), the grid is6F----J76divided into five level, the protocol is the center ofAgent-basedLogistic Grid Resource Contentssystem, theresource sharing and the interoperation couldLogisticInformation Service(LGRCIS)Resourcebe realized via protocols;EvaluationOpening grid service architecture(OGSA), the2)J813Middlewareserviceisthecenterof the systemarchitecture,andtheserviceLogistic Grid Resource Informationistheencapsulations of resources,namely,computingLogistic InformationService (LGRIS)resource, storage resource,and network service i.e.Theservice&Gridsharing of sources could be realized by the sharing of service.middleware价可Compared with 5LSA, OGSA have more consistenceLogistic Grid Resource Assignmentdynamics and agility.With the advent of OGSA, the GridManagement System (LGRAMS)technology is transferring from engineering scope to businessscope.--10BThecharacteristicsof Logistic system in networkenvironmentApplicatioThe logistic system is the comprehensive service system withistomernn Layerstomemulti-organization and diverse logistic resources.ThecollaborationamongtheorganizationsprovidetheFigure1 The architecture of LGS and working processorganizational guarantee for the system running, meanwhile.the logistic resource sharing provide the physical guarantee.As shown in figure 1, the paper present an architecture ofIn network environment, the similarities of logistic systemlogistic grid system which included the supply of resource,and the Grid system can be reduced to the following points:theGrid middleware and the utilization of resource.Firstly,thecritical problemisthedistributingand(1)ResourceProviderheterogeneous resources sharing.It depends on theThe constitution of resource layer aim to establish the logisticcharacteristic of logistic service,which concerns multi-resource node.and realize theconsistent description forprocess and various regions.The integrated logistic servicedistribute and heterogeneous logistic resource, and providecanbeprovides withthesources integration vianetwork,andinterface and protocol for higher level (Resource Grid layer,the resource sharing can enhance the efficiency of the service.InformationGridFor this reason, the resource management system and relatedlayer).The nodes in logistic Grid have the authority to controltechnical methods can be used for logistic systemthe local resource, and transfer within specific protocol bySecondly,logistic system has to solve the collaborativeGrid.The concept of node is not limit to the concept of solo-problemamongmulti-independentandautonomousorganizationorcompany,bothpartofthelogisticresourceinorganizations. In network environment, the logistic system issolo-organization or combined organizations can benot centralized systemconstructedfrom singularorganization,establishedtobeanodeinLGS..but formed from diverse organizations. Similar with GridThe resource nodes are dynamic, namely, the entry of newsystem, the resources in logistic system are autonomous andresource node and theexit of old resource nodecan bemulti-management.Sometims,it may.leadto targetrealized via specific authentication, it can provide thedisagreement of the resurce utilization, and the collaborationopenness, the flexibility and the agility of MDS.of multi-resources can not be fulfill. Moreover, for economicThe core of resource providing layer is to work out theproblem,theorganizationcollaborativeproblemwillbemoredescription of resource node and the protocols of resourceimportant than virtual grid system.691

resources. However, the detailed resources information about manufacturing activities is relatively insufficient. The established LRIM can’t support the resource data exchange and sharing among the heterogeneous systems under the logistic grid environment. ҉ LOGISTIC GRID SYSTEM AND ITS ARCHITECTURE A Logistic Grid System (LGS) The origin of Grid came from electric power system, and its purpose is to provide service in the same way as the power in the power network, regardless the service provider. Based on stated technology protocols, Grid can integrate the resource within network; provide the extraordinary service in uncentral controlled environment with the collaborative utilization of resources. The grid system structure is the fundamental and critical, it reflect the fundamental elements and function of Grid system. The currently structure types: (1) Five layers sandglass architecture(5LSA), the grid is divided into five level, the protocol is the center of system, the resource sharing and the interoperation could be realized via protocols; (2) Opening grid service architecture(OGSA), the service is the center of the system architecture, and the service is the encapsulations of resources, namely, computing resource, storage resource, and network service i.e. The sharing of sources could be realized by the sharing of service. Compared with 5LSA, OGSA have more consistence, dynamics and agility. With the advent of OGSA, the Grid technology is transferring from engineering scope to business scope. B The characteristics of Logistic system in network environment The logistic system is the comprehensive service system with multi-organization and diverse logistic resources. The collaboration among the organizations provide the organizational guarantee for the system running, meanwhile, the logistic resource sharing provide the physical guarantee. In network environment, the similarities of logistic system and the Grid system can be reduced to the following points: Firstly, the critical problem is the distributing and heterogeneous resources sharing. It depends on the characteristic of logistic service, which concerns multi￾process and various regions. The integrated logistic service can be provides with the sources integration via network, and the resource sharing can enhance the efficiency of the service. For this reason, the resource management system and related technical methods can be used for logistic system Secondly, logistic system has to solve the collaborative problem among multi-independent and autonomous organizations. In network environment, the logistic system is not centralized system constructed from singular organization, but formed from diverse organizations. Similar with Grid system, the resources in logistic system are autonomous and multi-management. Sometims, it may lead to target disagreement of the resurce utilization, and the collaboration of multi-resources can not be fulfill. Moreover, for economic problem, the organization collaborative problem will be more important than virtual grid system. Thirdly, dynamic responding. The same as Grid system, how reply to the dynamic changing and assure the consistency of service is also the concerned problem in logistic system. Dynamic is the fundamental characteristic of logistic, and it determines the diversity and uncertainty of logistic service. The enter and exit of resource should be reply in time. The consistency of service is the object of responding to dynamic changing, it means the service level have to be maintain for user of logistic system C The architecture of logistic grid system Based on the similarity of logistic system and Grid system, the architecture of logistic grid system can be established, the related technology and methods of Grid resource management can be used for reference. Logistic Resource Logistic . Resource Logistic Resource As shown in figure 1, the paper present an architecture of logistic grid system which included the supply of resource, the Grid middleware and the utilization of resource. (1) Resource Provider The constitution of resource layer aim to establish the logistic resource node, and realize the consistent description for distribute and heterogeneous logistic resource, and provide interface and protocol for higher level (Resource Grid layer, Information Grid layer). The nodes in logistic Grid have the authority to control the local resource, and transfer within specific protocol by Grid. The concept of node is not limit to the concept of solo￾organization or company, both part of the logistic resource in solo- organization or combined organizations can be established to be a node in LGS. . The resource nodes are dynamic, namely, the entry of new resource node and the exit of old resource node can be realized via specific authentication, it can provide the openness, the flexibility and the agility of MDS. The core of resource providing layer is to work out the description of resource node and the protocols of resource Logistic Grid Resource Contents Information Service˄LGRCIS˅ Logistic Grid Resource Information Service˄LGRIS˅ Logistic Grid Resource Assignment Management System˄LGRAMS˅ Customer 1 Customer 2 ĂĂCustomer n Agent-based Logistic Resource Evaluation Middleware 1 2 3 4 5 6 7 8 9 10 Resource Provider Logistic Information service & *ULG PLGGOHZDUH Applicatio n Layer Figure 1 The architecture of LGS and working process 691

utilization.Thedescription intheresourcenodeisnotonlytoAconfigurableaggregate contents component,namelysupply the information likethe sizeof transportationfleet,thegrid index information service (GIIS)area of the storage etc., it also provide the combination andGRAM is located at the bottomof grid resource managementencapsulation the centralized resources within the nodes,structure, it is mainly to deal the resource request, theprovide effective information corresponding logistic capacitytransaction of long distance application, and the resourcefor LGS to identify and utilize the logistic resource.allocation and activetask management, meanwhile,transmitThe utilizing protocol aim to provide control and utilizingtheupdate resourceinformation toMDSmechanism foe solo-resource in MGS, clear the relatedIVMODELINGTECHNIQUEOFLOGISTICRESOURCESINLGSbenefit and risk of resource utilization.BASED ON XML(2) Logistic Information Service&GridmiddlewareLogistic information service include the Logistic GridIn order to establish logistic grid resources informationResourceContentsInformationService（LGRCIS)andmodel, it needs to accomplish the contents in following threeLogisticGridResourceInformationServiceLGRCIS):aspects:(1)Abstracting the main conceptions of logisticgrid+LGRCIS provide the logistic resources contents list basedresources and establishing logistic resources conceptualon the available logistic resources in the system.·LGRCIS provide corresponding information according asmodel (LRCM); (2) Realization on the transfer frommanufacturing conceptual model to oriented-object UMLthespecificrequirementofthelogisticservicemodel; andThe Grid middleware is the kernel layer for the function of(3) Realization on the mapping from logistic resourcesLGS, it can not only shield the distributing and heterogeneousoriented-objectUML model to XML Schema.resources,nutalsotoprovideuniformandtransparentserviceThe process model of the modeling of logistic resources isinterface. From the bottom up, it should include resource grid,shown in figure 2.information resource grid and the service grid respectively.(3)ResourceApplicationEstablishing the Logistic ResourceThe application layer is the connection between the customerConcept model (LRCM)and the LGS, therefore, its function include :Establishing the friendly interfacefor customer visiting,Mapping Principles+Service providing,from LRCM to UML-Submission the customer requirements to service grid.The application layer aim to provide a comprehensive logisticUML model of Logistic Resourceservice solution for customer, that means it is not necessaryInformation in LGSfor customerto paymuchmoreattentionontheprocessdetails, so the application layer should shield theMapping Principles fromcharacteristics of the under layer resources.UML to XML SchemaDTheworking process of LGSAs shown in figure 1, the working process of LGS includeXML schema of Logistic Resourcefollowing steps:Information in LGS1.The submission of customer requirements;Writing rules fromXML2.The selection in LGRIS conducted by LGRAMS;schema to XMLdocuments3.LGRIS submit the corresponding resource information toLGRCIS;XML documents of Logistic4.The resource information transfer to Agent-basedLogistic Resource Evaluation Middleware for resourceResourceInformation inLGSevaluation;5.The resource evaluation results return to LGRCISFigure 2 The process model of the modeling of6.The submission of the evaluated logistic servicelogistic resourceinLGSinformation to Resource Provider layer;7.The selected logistic resources return to LGRCIS9.LGRCISreturn theresource contents information toA Logistic resources Conceptual Model (LRCM)LGRIS;Conception is an abstract of the actual world, that is to9.LGRIS return the the resources information to LGRAMSsay,conception is to handle artificially the practical matters,10.LGRAMSassign thelogistic serviceto correspondingthings and notions, to draw out the common qualitiescustomer.concerned by people, ignoring the inessential detail and toThe realization of this process is based on the Globus Tookitdescribe these qualities precisely in various conceptions.which provides the meta-computing deal service (MDS) andConceptualmodelistheexhibitionoftheconceptionsandtheGrid resource allocation manager (GRAM).relationship among these conceptions and it is independentMDS providefollowing components:from the technique use to put it into practice. Therefore, theAconfigurableinformation provider component,namely,conceptual model which is established for logistic resources isGrid resource information service (GRIS),simultaneously effective when used in the XML system.692

utilization. The description in the resource node is not only to supply the information like the size of transportation fleet, the area of the storage etc., it also provide the combination and encapsulation the centralized resources within the nodes, provide effective information corresponding logistic capacity for LGS to identify and utilize the logistic resource. The utilizing protocol aim to provide control and utilizing mechanism foe solo-resource in MGS, clear the related benefit and risk of resource utilization. (2) Logistic Information Service & Grid middleware Logistic information service include the Logistic Grid Resource Contents Information Service ΰ LGRCIS α and Logistic Grid Resource Information ServiceΰLGRCISα: LGRCIS provide the logistic resources contents list based on the available logistic resources in the system, LGRCIS provide corresponding information according as the specific requirement of the logistic service. The Grid middleware is the kernel layer for the function of LGS, it can not only shield the distributing and heterogeneous resources, nut also to provide uniform and transparent service interface. From the bottom up, it should include resource grid, information resource grid and the service grid respectively. (3)Resource Application The application layer is the connection between the customer and the LGS, therefore, its function includeΚ Establishing the friendly interface for customer visiting, Service providing, Submission the customer requirements to service grid. The application layer aim to provide a comprehensive logistic service solution for customer, that means it is not necessary for customer to pay much more attention on the process details, so the application layer should shield the characteristics of the under layer resources. D The working process of LGS As shown in figure 1, the working process of LGS include following steps: 1. The submission of customer requirements; 2. The selection in LGRIS conducted by LGRAMS; 3. LGRIS submit the corresponding resource information to LGRCIS; 4. The resource information transfer to Agent-based Logistic Resource Evaluation Middleware for resource evaluation; 5. The resource evaluation results return to LGRCIS; 6. The submission of the evaluated logistic service information to Resource Provider layer; 7. The selected logistic resources return to LGRCIS; 8. LGRCIS return the resource contents information to LGRIS; 9. LGRIS return the the resources information to LGRAMS; 10. LGRAMS assign the logistic service to corresponding customer. The realization of this process is based on the Globus Tookit, which provides the meta-computing deal service (MDS) and Grid resource allocation manager (GRAM). MDS provide following components: A configurable information provider component, namely, Grid resource information service (GRIS), A configurable aggregate contents component, namely, grid index information service (GIIS). GRAM is located at the bottom of grid resource management structure, it is mainly to deal the resource request, the transaction of long distance application, and the resource allocation and active task management, meanwhile, transmit the update resource information to MDS. Ҋ MODELING TECHNIQUE OF LOGISTIC RESOURCES IN LGS BASED ON XML In order to establish logistic grid resources information model, it needs to accomplish the contents in following three aspects: (1) Abstracting the main conceptions of logistic grid resources and establishing logistic resources conceptual model (LRCM); (2) Realization on the transfer from manufacturing conceptual model to oriented-object UML model; and (3) Realization on the mapping from logistic resources’ oriented-object UML model to XML Schema. The process model of the modeling of logistic resources is shown in figure 2. Establishing the Logistic Resource Concept model (LRCM) UML model of Logistic Resource Information in LGS Mapping Principles from LRCM to UML Mapping Principles from UML to XML Schema XML schema of Logistic Resource Information in LGS Writing rules from XML schema to XML documents XML documents of Logistic Resource Information in LGS Figure 2 The process model of the modeling of logistic resource in LGS A Logistic resources Conceptual Model (LRCM) Conception is an abstract of the actual world, that is to say, conception is to handle artificially the practical matters, things and notions, to draw out the common qualities concerned by people, ignoring the inessential detail and to describe these qualities precisely in various conceptions. Conceptual model is the exhibition of the conceptions and the relationship among these conceptions and it is independent from the technique use to put it into practice. Therefore, the conceptual model which is established for logistic resources is simultaneously effective when used in the XML system. 692

words.Conceptual model is the foundation of creating markup.Although,itis separate fromthe realization technique,the(2)A cardinal number is use to express the constraintobjects and attributes defined during this period usuallybetweentwo nodes.If therelationship ofthetwonodes isbecome theelements and attributes at last in theprocess of theone-to-one,then the cardinal number is one, if themodelingoflogistic resources.In other wordsin order torelationship of the two nodes is one-to-more,then theestablish LRI oriented-object UML model and the XMLcardinal number is more than one.The constraint relationshipSchema, it is necessary to analyze the constructiveof one-to-more is expressed in the symbol *".In the figurecharacteristics of the logisticresources to abstract theof LRCM, the symbol *" is put nearby the subordinativeconceptions of LRI and toestablishtheLRCMon theabovenodes.mentioned basis.(3)The main conceptions are expressed in the form ofThe conceptions are the foundation of conceptual model.nodes, and the nodes were linked by sideline.Therefore, before stabling the LRCM, the main conception ofAccording to above established principles,a logisticthe logistic resources should be abstracted. Take the machineresource's conceptions model is shown in Figure 3tools for example, before establishing the conceptual modelof it, the main conceptions and the relationship among themBEstablishing the oriented-object UML modelshown infigure2 could beestablished.According to above principles, the logistic resourcesThe conceptual mode is the exhibition of the conceptionsconceptual mode shown in Figure 3can be transform into theand the relationship among these conceptions, and allUMLmode grape show inFigure4.conceptions and relationship are expressed in the form ofSome principles should be abided by when transforminggraph. Detailed object, the conceptions, which can bethe LRCM into oriented-object UML model. In this paper wecomprehended easily,and the relationship distinctly definedset the following corresponding principles:areabstracted asnodes in conceptual mode,and thefeatureof(1)Each node that has subordinate nodes in conceptualconceptions is expressed as the sideline in the graph. In thismodel mapa Class inUMLpaper, we set the following principles to establish the LRCM(2)If thecardinal number of acharactertoa conception isaccording to the abstracted conception and relationship of thebigger than one, or the other information in this fieldlogistic resources in LGS:demonstratesthatanassociation should beestablished,then(1)The nodes are expressed in the form of ellipse, thethe relation should map an association in UML graph.words describing the conceptions are written in the ellipse.Otherwise, if the cardinal number of a character to aAll the ellipse are linked by a line which marked sideline,conception is only one or optional, the character in conceptualthe end of the sideline has an arrowhead which point to themodel maps an attribute in UML.subordinative nodes. And the sideline is marked by describingLiftmachineNameTransportation machineTypeTypeLoad&Unload machineLift machineTransportation machineCirculating machine-Load&Unload machineLogistic ResourceThe main concept model ofa logistic Model.....DescriptionCirculating machineOver loadName......CodeType2InsufficiencyCode2StateMaintenanceStateManufactureStateVacancyPurchase timeOrderedOver loadLGuarantee timeInsufficiencyProcesscapabilityManufactureInstructionMaintenancePurchase timeProcessing object typeUsermanualAVacancyAccessoryGuarantee timeProcessing weightOrderedAssociationProcess capabilityProcess sizeParameterInstructionProcessing scopeUser manual_Process constraintsAssociationAccessoryControlControlSurportSurportAssociation2AssociationAssociationMembershipMembership.....ParameterFigure 3 Main concept of a Logistic ResourceFigure 4 the UML model of logistic resourceaccordingtoConceptualmodel693

Conceptual model is the foundation of creating markup. Although, it is separate from the realization technique, the objects and attributes defined during this period usually become the elements and attributes at last in the process of the modeling of logistic resources. In other words, in order to establish LRI’ oriented-object UML model and the XML Schema, it is necessary to analyze the constructive characteristics of the logistic resources to abstract the conceptions of LRI and to establish the LRCM on the above mentioned basis. The conceptions are the foundation of conceptual model. Therefore, before stabling the LRCM, the main conception of the logistic resources should be abstracted. Take the machine tools for example, before establishing the conceptual model of it, the main conceptions and the relationship among them shown in figure 2 could be established. The conceptual mode is the exhibition of the conceptions and the relationship among these conceptions, and all conceptions and relationship are expressed in the form of graph. Detailed object, the conceptions, which can be comprehended easily, and the relationship distinctly defined are abstracted as nodes in conceptual mode, and the feature of conceptions is expressed as the sideline in the graph. In this paper, we set the following principles to establish the LRCM according to the abstracted conception and relationship of the logistic resources in LGS: ŁThe nodes are expressed in the form of ellipse, the words describing the conceptions are written in the ellipse. All the ellipse are linked by a line which marked sidelineˈ the end of the sideline has an arrowhead which point to the subordinative nodes. And the sideline is marked by describing words. łA cardinal number is use to express the constraint between two nodes. If the relationship of the two nodes is one-to-one, then the cardinal number is one; if the relationship of the two nodes is one-to- moreˈthen the cardinal number is more than one. The constraint relationship of one-to-more is expressed in the symbol “*”. In the figure of LRCM, the symbol “*” is put nearby the subordinative nodes. ŃThe main conceptions are expressed in the form of nodes, and the nodes were linked by sideline. According to above established principles, a logistic resource’s conceptions model is shown in Figure 3. B Establishing the oriented-object UML model According to above principles, the logistic resources’ conceptual mode shown in Figure 3 can be transform into the UML mode grape show in Figure 4. Some principles should be abided by when transforming the LRCM into oriented-object UML model. In this paper we set the following corresponding principles: ŁEach node that has subordinate nodes in conceptual model map a Class in UML. łIf the cardinal number of a character to a conception is bigger than one, or the other information in this field demonstrates that an association should be established, then the relation should map an association in UML graph. Otherwise, if the cardinal number of a character to a conception is only one or optional, the character in conceptual model maps an attribute in UML. Name Description Process capability Type Lift machine Transportation machine Load & Unload machine Circulating machine ĂĂ Manufacture Code State Over load Insufficiency Maintenance Vacancy Ordered Purchase time Guarantee time Processing object type Processing weight Process size Processing scope Process constraints User manual Instruction Accessory Association Control Surport Association Membership Parameter ĂĂ Figure 3 Main concept of a Logistic Resource The main concept model of a logistic Model Lift machine Transportation machine Load & Unload machine Circulating machine  ĂĂ Type Name Type Code State  Manufacture  Purchase time  Guarantee time  Process capability  Instruction  User manual  Accessory  Association  Parameter Logistic Resource Over load Insufficiency Maintenance Vacancy  Ordered State Control Surport Association Membership  ĂĂ Association Figure 4 the UML model of logistic resource according to Conceptual model 693

(3)The variety of Association can bedemonstrated in theACKNOWLEDGEMENTformof“mn",mdenotes thesmallestvalueofthe-This paper is supported by the National Natural Scienceassociation and n denotes the biggest value of the association,Foundation Project of China:digital manufacturing theorythe symbol "*" denotes zero or more. The association that hasand key techniquesunder networked environment (50335020)no variety can be demonstrated in the form "1...1"or"1".TheREFERENCESsymbols that denote associations and are the same as thesymbols that denotes attributes expect that the symbol “""[] Changxue Feng. Andrew K. Constraint-based design of parts[]denotes the variety of attributes.CAD,1995,27(5):343-352[2] Kjiellbeg T, Bolin M. Design of a manufacturing resource information(4)The conception that has no character maps an attributesystem[J. Annals of the CIRP, 1996,45(1):149-152in UML[3] Gao J X, Huang X X. Product and manufacturing capability modeling inintegrated CAD/processplanning environment[].Int.J.AdvancedManufacturing.1996,(11):43-61C Establishing theXML Schema of logistic resources[4] Case K. Using a design byfeaturesCADsystem for processThe key of the mapping from UML to XML Schema iscapability[], Computer Integrated Manufacturing System,1994,7(1):39-to resolve theproblems of the mapping of corresponding49namespace, the constraint to variety,the uniqueness of the[5] Shao Xinyu, Li Peigen, Ma Weidong et al. Modeling of the facilityenbironment in CIM and CE[]. J.Huazhong Univ.of Sci.&Tech,element and the element value, inherit the sequence of the199523(2):14-17(inChinese)element, data type, interlinkage. In this paper, we set the[6] Song Yuyin, Che xiuPing., Cai Fuzhi. Research on logistic resourcesfollowing principles for the mapping from UML to XMLcapability modeling and its application based in STEP[]. ComputerSchema:integrated manufacturing system—CIMS, 1999 :5 (4) : 46-50 (in(I)TheUMLmodelmapstoa namespaceinXML SchemaChinese)[7] Yan Bo, Huang Biqing, Zheng Li, Xiao Tianyuan, Research on the Gridall the elements in XML Schema, such as schema, element.anditsapplicationinManufacturing,ComputerIntegratedcomplextypeetal,areincludedinthenamespaceManufacturingSystemsSep.2004Vol.10No.9(2)The unique element name in XML Schema is decided by[8]Zhang J, Yang Dongyuan, Science&Technology Review,2005.10the contents oftheXML Schema document.Otherwise, a new[9]Zhou Le,Ji Jianhua,Research on Virtual Logistics ResourceDistributionBased on Grid Technology,Modular MachineTool & Automaticdetail element name should be introduced to ensure theManufacturing Technique, 2007.04uniqueness of the element name.[1o]LONG Yun-jun; JIANG Da-li, Research on Virtual Logistics Resource(3)Each class,association,attribute et al in UML maps aDistribution Based on Grid Technology , Logistics Technology, 2007.02different element in XML Schema.(4)The elements in XML document should come forthaccording to an appointed sequence.(5)The data type of each Attribute in XML Schema is thesame as the data type in UML, and prefix of"xsd"should beadded in front the element in XML Schema.For example, ifthe data type ofthe attribute"resource ID"in UML is string,then the data type of its mapping element in XML Schema isdenoted as"xsd: string""(6)ID and IDREF can be used to demonstrate the interlinkagein XML Schema's document.If other resources are needed tolink,the attribute“hreff'can be used.Accordingto abovemappingrulesbetween UML andXML Schema, the logistic resourcesUML mode shown incan be transformed into the XML Schema easily.VCONCLUSIONThe LRIM is the foundation for resources encapsulating,publishing and discovering, and is responsible for providingstandard exchanging data to support collaboration in LGS.Inthis paper, a new method of modeling of LRI in LGS basedon XML is proposed, which conquers the shortage oftraditional resources modeling methodology that is unable tosupport the resources data exchanging and sharing betweenheterogeneous systems. The LRIM established by theproposed modeling method proved to be able to provide auniform and completeresourcesinformation to supporttheservice providing and sharing among the heterogeneoussystems for collaboration under LGS.694

ŃThe variety of Association can be demonstrated in the form of “mün”ˈ m denotes the smallest value of the association and n denotes the biggest value of the association, the symbol “*” denotes zero or more. The association that has no variety can be demonstrated in the form “1.1”or “1”. The symbols that denote associations and are the same as the symbols that denotes attributes expect that the symbol “[]” denotes the variety of attributes. ńThe conception that has no character maps an attribute in UML. C Establishing the XML Schema of logistic resources The key of the mapping from UML to XML Schema is to resolve the problems of the mapping of corresponding namespace, the constraint to variety, the uniqueness of the element and the element value, inherit the sequence of the element, data type, interlinkage. In this paper, we set the following principles for the mapping from UML to XML Schema: ŁThe UML model maps to a namespace in XML SchemaΔ all the elements in XML Schema, such as schema, element, complex type et al, are included in the namespace. łThe unique element name in XML Schema is decided by the contents of the XML Schema document. Otherwise, a new detail element name should be introduced to ensure the uniqueness of the element name. ŃEach class, association, attribute et al in UML maps a different element in XML Schema. ń The elements in XML document should come forth according to an appointed sequence. ŅThe data type of each Attribute in XML Schema is the same as the data type in UML, and prefix of “xsd” should be added in front the element in XML Schema. For example, if the data type of the attribute “resource ID” in UML is string, then the data type of its mapping element in XML Schema is denoted as “xsd: string”. ņID and IDREF can be used to demonstrate the interlinkage in XML Schema’s document. If other resources are needed to link, the attribute “hreff” can be used. According to above mapping rules between UML and XML Schema, the logistic resources’ UML mode shown in can be transformed into the XML Schema easily. ҋ CONCLUSION The LRIM is the foundation for resources encapsulating, publishing and discovering, and is responsible for providing standard exchanging data to support collaboration in LGS. In this paper, a new method of modeling of LRI in LGS based on XML is proposed, which conquers the shortage of traditional resources modeling methodology that is unable to support the resources data exchanging and sharing between heterogeneous systems. The LRIM established by the proposed modeling method proved to be able to provide a uniform and complete resources information to support the service providing and sharing among the heterogeneous systems for collaboration under LGS. ACKNOWLEDGEMENT This paper is supported by the National Natural Science Foundation Project of China: digital manufacturing theory and key techniques under networked environment (50335020) REFERENCES [1] Changxue Feng, Andrew K. Constraint-based design of parts[J]. CAD,1995,27(5):343-352 [2] Kjiellbeg T, Bolin M. Design of a manufacturing resource information system[J]. Annals of the CIRP, 1996,45(1):149-152 [3] Gao J X, Huang X X. Product and manufacturing capability modeling in integrated CAD/process planning environment [J]. Int.J.Advanced Manufacturing,1996,(11):43-61 [4] Case K. Using a design by features CAD system for process capability[J]. Computer Integrated Manufacturing System,1994,7(1):39- 49 [5] Shao Xinyu, Li Peigen, Ma Weidong et al. Modeling of the facility enbironment in CIM and CE[J]. J.Huazhong Univ.of Sci.&Tech Δ 1995Δ23ΰ2αΚ14-17 (in Chinese) [6] Song Yuyin, Che xiuPing, Cai Fuzhi. Research on logistic resources capability modeling and its application based in STEP[J]. Computer integrated manufacturing system—CIMS, 1999Δ5ΰ4αΚ46-50 (in Chinese) [7] Yan Bo, Huang Biqing, Zheng Li, Xiao Tianyuan, Research on the Grid and its application in Manufacturing, Computer Integrated Manufacturing Systems Sep . 2 0 0 4 Vol. 10 No. 9 [8] Zhang J, Yang Dongyuan, Science & Technology Review, 2005.10 [9] Zhou Le, Ji Jianhua; Research on Virtual Logistics Resource Distribution Based on Grid Technology, Modular Machine Tool & Automatic Manufacturing Technique, 2007.04 [10] LONG Yun-jun; JIANG Da-li, Research on Virtual Logistics Resource Distribution Based on Grid Technology , Logistics Technology, 2007.02 694