user-defined tags defined in a document type definition (DTD) file.
Tags are nested hierarchically from a single root tag that can contain
any number of child tags. Any child tag in turn can contain any num-
ber of child tags. Each tag contains a begin statement (for example,
<Case>) and an end statement (for example, </Case>). This is illus-
trated in Figure 8.2.
8.3.7 Case Acquisition
Western Air had already put a considerable amount of effort into de-
veloping their HVAC installation database, which was used as the case
library for our system. Consequently the project was fortunate in not
having to acquire cases or preprocess them. However, knowledge engi- ...