After all, we have emphasized before that a list may contain different kinds of things. This data definition differs from that of a list of symbols in that it has three clauses instead of two and that it has three self-references instead of one. Of these self-references, the one at the beginning of a cons tructed list is the most unusual one. We refer to such Web pages as immediately embedded Web pages. Because the data definition is unusual, we construct some examples of Web pages before we continue.
Project aims to improve students' problem-solving and organization skills.
It contains nothing but words. The immediately embedded pages start with parentheses and the symbols ' LectureNotes , ' Guidance , ' Exercises , and ' Solutions . The second embedded Web page contains another embedded page, which starts with the word ' DrScheme . We say this page is embedded with respect to the entire page. The two Web pages above suggest two good examples, but they are too complex.