Mobile and Semantic Web-Based Delivery of Context-Aware Information and Services in Construction - Mobile and Pervasive Computing in Construction - page 18

Figure 2.4 Prototype implementation
The semantic view of construction project resources logically interconnects
project resources, resulting in the better application of context information.
Atthesametimeitalsoenablesuserstohavedifferentviewsofdata,basedon
different criteria such as location and profile (e.g. all the electric drawings for
floor 3). This allows mapping of the captured context (e.g. John is an electrician
working on floor 3) to available data (e.g. electrical drawings of floor 3). As the
user context changes (i.e. change of location, tasks), the broker recalculates the
available services to users in real time. The output from the broker is then fed into
applications to make them aware of events on the site. Context information is
then used to support both “pull” and “push”-based information delivery. This
approach was facilitated by the development of a semantic context broker
(OntoWise) and a project data repository that follows a strict ontology for
information classification (Figure 2.3).
2.5 Development of the project repository
The project database/repository acts as a shared repository for all project-related
data (e.g. project documents and drawings) that can be accessed by all project
participants. Semantic annotation, using the ontology developed for all project
documents and drawings, is used to develop the project repository. These annota-
tions facilitate indexing and searching and enable improved ways of information
submission and retrieval, by describing resources and links between them. Such
semantic description also enables agents to intelligently synthesize the content from