Chunithipaisan et al., 2002) to describe how features are connected. A network family contains a set of various features types that make up a network. Feature types are defined in a group if they are the same kind of feature types e.g. road, street, avenue are grouped in road. As feature types are defined using a generic group name, the network family provides a tool to map feature types used in the databases to the generic group name used in the connectivity rules. Two documents are required for defining the network family. One is the rules of feature connectivity; another is the semantic of the feature types. The connectivity of features can be model
LED as shown in figure 2.
Figure 2. Feature connectivity model
As shown in figure 2, we can document the rule of feature connectivity in the network family in XML as follows.
As discussed previously, the names of features coded in the rules are the representative name of feature types which can be defined in the same common group. In order to link back to the database/dataset name used in an application, the document of semantic links is required. The sample of coding semantic links follows.
The relationship of documents which are required for each project can be shown in figure 3.
Figure 3. The software system architecture As shown in figure 3, project document contains three separate XML documents that are
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