Thesis full text (PDF) - Politecnico di Milano

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serializations. Such separation grants the independence from the specific reasoning engine and from the UML serialization format. Controller (Servlet) Actions (Java classes) Page Services (Java classes) Knowledge Base Interface (Java) Web browser WEB Web server View (JSP) State Objects (Java) Knowledge Exploration Unit Services (Java classes) Tableau Reasoner Internalization TBox Absorption Symbols Components Interaction HTTP/SOAP messages Component Servlet Container Knowledge Management Operation Services (Java classes) Business Logic Service Species Validation & Ontology Repair Knowledge Layer - Pellet XMI Subcomponent Application Server Data Layer Figure 4.3: Runtime architecture for the framework 4.3 Implementation of Components As we have mentioned earlier, the framework components are specified as new WebML primitives. For their implementation we exploit the WebRatio plug-in mechanism, which allows to define new units and to seamlessly integrate them in the design and execution of the applications. In the following we describe the list of new WebML units that have been defined as implementations of the components discussed in Section 3. 4.3.1 Content publishing units The Hierarchy, Class, Datatype, Property, Property Value, Instance, and Explanation components are implemented as content units. The UML classes acting as selection conditions for the corresponding UML component are defined for the respective content unit, with values being parametric on the user choices. The units produce in output the names of the deducted elements. Table 4.1 summarizes the Hierarchy components together with their symbol, the expected inputs and delivered outputs. The remaining exploration components are summarized in table 4.2. 70
Description Classes Hierarchy Unit Properties Hierarchy Unit Input: optional class names to be used at the selection conditions Output: structured set of class names Input: optional property names to be used at the selection conditions Output: structured set of property names Table 4.1: WebML hierarchy components Description Class Unit Datatype Unit Property Unit Instance Unit Explanation Unit Property Value Unit Input: optional names for (disjoint) classes, typed instances, defined properties Output: set of class names Input: optional names for datatypes, defined properties, and values Output: set of datatype names Input: optional names for (disjoint, inverse) properties, assigned instances, defining classes and datatypes Output: set of property names Input: optional names for (assigned) instances, defining classes Output: set of instance names Input: optional names for classes, properties, instances Output: set of assertions retrieved Input: optionnal parameter for the evaluation of datatypes, defined properties, values Output: set of property values deducted Table 4.2: WebML exploration components 4.3.2 Content management operations The content management components are implemented as WebML operation units. The implementation consists of pieces of code analogous to the publishing content units. A first set of 71
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POLITECNICO DI MILANO V Facoltà di
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Table of Contents Abstract ........
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1. Introduction At present the Web
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• Definition of the formal repres
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This approach overcomes the develop
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Both the teleological and the ontol
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consists of a data schema, describi
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high-level business rules, written
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Thanks to the automatic generation
Page 19 and 20: 2.4.2 RDF Resource Description Fram
Page 21 and 22: Third, besides the aforementioned r
Page 23 and 24: The XMI serialization of UML [33] e
Page 25 and 26: 2.9.2.1 Pellet Pellet 1 [47] is an
Page 27 and 28: 3. Semantics Web based Recommendati
Page 29 and 30: them by invoking respectively the c
Page 31 and 32: etrieves the properties by their ca
Page 33 and 34: Figure 3.6: Instance Component 3.1.
Page 35 and 36: 3.1.8 Add Components The Add compon
Page 37 and 38: Add Class Component ClassDisjointOf
Page 39 and 40: PropertyDisjointOfProperty (for ins
Page 41 and 42: first-class citizens, we have more
Page 43 and 44: Figure 3.17: Remove Datatype Compon
Page 45 and 46: 3.1.19 Remove Instance component Th
Page 47 and 48: 3.2.4 Export-XMI-from-KB component
Page 49 and 50: 3.3.1.2 Properties of a class patte
Page 51 and 52: 3.3.1.5 Instances of a class assumi
Page 53 and 54: 3.3.1.8 Instances of a class assumi
Page 55 and 56: 3.3.2.2 Remove property value for a
Page 57 and 58: 3.4.2 Application Specification In
Page 59 and 60: Action • View Notification: Group
Page 61 and 62: Send Group Invitation Actor: Group
Page 63 and 64: A user can recommend friend as Frie
Page 65 and 66: In the figure 3.37, a User browsing
Page 67 and 68: Through the entry unit in figure 4.
Page 69: Figure 4.2: Example of WebML hypert
Page 73 and 74: Add PropertyValueAxiom Input: manda
Page 75 and 76: 4.4. The top segment of the page is
Page 77 and 78: page otherwise it will go to the er
Page 79 and 80: We are showing current user’s inf
Page 81 and 82: current user is sending a friend in
Page 83 and 84: The information of a particular gro
Page 85 and 86: Figure 4.20: HTML view to Post New
Page 87 and 88: the application domain as extended
Page 89 and 90: Knowledge Instances Yes Yes Yes Yes
Page 91 and 92: OWL DL KB Framework CLASS HIERARCHI
Page 93 and 94: of a specific group members of the
Page 95 and 96: [22] OMG UML (2007), Unified Modeli
Page 97: [56] BRAMBILLA, M., CERI, S., FRATE
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