Week 15 reading note

The use of wildcards allows generalization beyond specific words, while contextual restrictions limit the wildcard-matching to entities related to the user's query.

The first type of wildcards should match entities of a specific type. We call these as S-Wildcards (Specific entity type Wildcards). The second type of wildcards can match against all types of entities. We call these as A-Wildcards (Any entity type Wildcards).

The ontology becomes a means of communication between the user and the system and helps overcome the bottlenecks in information access, which is primarily based on keyword searches. It supports information retrieval based on the actual content of a page and helps navigate the information space based on semantic concepts.