xml的運(yùn)用---知識(shí)管理工具(參考版)
2025-01-16 02:25本頁(yè)面
【正文】 s parameters child element ? A variant name whose parameters include the ? display? or ? sort? published subjects, which is semantically equivalent to display names and sort names (respectively) as defined in ISO 13250. Variants ? variants are names for a specific purpose and/or in a specific format: ? name, as it should – appear on a mobile display – logo on blackwhite screen ? high resolution ? low resolution – be used for sorting Variants (cont?d) ? external representations – anized as a tree – parameters control which variant will be used Topic Types Topic Types (cont?d) ? topic types introduce a type hierarchy ? every topic map has its own type hierarchy ? there is NO global type system (ontology) Topic instanceOf ? The instanceOf element specifies the class to which its parent belongs, via a topicRef or subjectIndicatorRef child element. ? The instanceOf element is a syntactic shortcut for an association of a special type defined by the classinstance published subject. Topic Types (Example) Topic SubjectIdentity ? The subjectIdentity element specifies the subject that is reified by a topic, via resourceRef, subjectIndicatorRef, and/or topicRef child elements. ? When a topic has an addressable subject, the subject can be addressed directly via a resourceRef element. In that case, it is the resource itself which is considered the subject of the topic, not what the resource means or indicates. There can be only one such resource per topic. ? Resources may also be subject indicators, as opposed to subjects in and of themselves. Resources are used to indicate subjects via subjectIndicatorRef elements, of which there may be more than one per topic. ? A topic may also indicate that it has the same subject as another topic by addressing that topic via a topicRef element. Associations ? topics can participate in relationships, called association, in which topics play roles as members ? Among the associations, which relationship two or more topics have to each other. It must be explicitly defined. ? topics play there – Members: the topics involved in the association are called members – Role: and the members play the role. ? typical associations – islocatedin, livedin, writtenby – isfacillityprovidedby, requirestohave Association (Example) Associations (cont?d) ? all newly introduced topics has to be defined: – islocatedin, building, location ? also these topics can be linked with associations ? associations can have any number of members (1, 2, 3, ...) Topic Occurrences Topic Occurrences (cont?d) Scopes ? not all topic characteristics are valid in all contexts ? scopes limit a characteristic ? scopes are topics themselves Scopes (cont?d) ? occurrences: – a web document could be written in german – the document is not for a beginner, but an expert – a visa to visit a country is not relevant for residents, only for nonresidents ? name
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