Human-Computer Interaction: Communication, Cooperation, and Application Design

By Hans-Jörg Bullinger; Jürgen Ziegler | Go to book overview
Save to active project

Although HTML 4.0 has introduced a number of features which allows the creation of highly structured tables, it is too rigid and unstructured. The tree representation devised here is meant to provide a more flexible encoding of the structural and semantic information encoded in the table. The tree representation will be explicitly created and kept associated with the document. It will be encoded as RDF meta-data ( Brickley et al 1998).

Figure 1: Table and Structural Representation

Two Dimensional and Multi-dimensional Tables: The first issue in the design of the structural representation of the table is the identification of the descriptive information. We can distinguish different types of descriptive information. Global and Local information provide textual description of the table and of each cell (e.g., using summary and title attributes). Indexing information denotes rows/columns of the table as headers (using the THEAD and TH HTML elements), thus providing a description of the dimensions of the table. Generally, it is possible to define any cell as header and place it anywhere inside the table. The effect of the header element can be controlled using the scope and headers attributes. Most tables (e.g., HTML 3.2 compliant) are regular, i.e., they explicitly identify header rows/columns, and they do not use irregular HTML constructions (e.g., scope, headers). The explicit presence of the header information allows one to easily construct the indexing component of the tree structure (as in Figure 1). In absence of additional information, headers will provide indexing/navigation into the table. The position of the header rows/columns may also have a semantic meaning and will be used to partition the table in sub-tables. In absence of additional semantic information on the content of the table, a generic search strategy will be provided to the user, relying on using the header information as indices into the table -- i.e., select dimensions and cells by scanning the header rows/columns.

HTML 4.0 allows the creation of irregular/multi-dimensional tables characterized by the presence of indexing/header information irregularly located

-794-

Notes for this page

Add a new note
If you are trying to select text to create highlights or citations, remember that you must now click or tap on the first word, and then click or tap on the last word.
Loading One moment ...
Project items
Notes
Cite this page

Cited page

Style
Citations are available only to our active members.
Sign up now to cite pages or passages in MLA, APA and Chicago citation styles.

Cited page

Bookmark this page
Human-Computer Interaction: Communication, Cooperation, and Application Design
Table of contents

Table of contents

Settings

Settings

Typeface
Text size Smaller Larger
Search within

Search within this book

Look up

Look up a word

  • Dictionary
  • Thesaurus
Please submit a word or phrase above.
Print this page

Print this page

Why can't I print more than one page at a time?

While we understand printed pages are helpful to our users, this limitation is necessary to help protect our publishers' copyrighted material and prevent its unlawful distribution. We are sorry for any inconvenience.
Full screen
/ 1364

matching results for page

Cited passage

Style
Citations are available only to our active members.
Sign up now to cite pages or passages in MLA, APA and Chicago citation styles.

Cited passage

Welcome to the new Questia Reader

The Questia Reader has been updated to provide you with an even better online reading experience.  It is now 100% Responsive, which means you can read our books and articles on any sized device you wish.  All of your favorite tools like notes, highlights, and citations are still here, but the way you select text has been updated to be easier to use, especially on touchscreen devices.  Here's how:

1. Click or tap the first word you want to select.
2. Click or tap the last word you want to select.

OK, got it!

Thanks for trying Questia!

Please continue trying out our research tools, but please note, full functionality is available only to our active members.

Your work will be lost once you leave this Web page.

For full access in an ad-free environment, sign up now for a FREE, 1-day trial.

Already a member? Log in now.

Are you sure you want to delete this highlight?