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- Non-obvious capabilities of PC-Hypertext
- ========================================
-
- PC-Hypertext includes a number of features that may not be intuitively
- obvious to even the most experienced computer user. For example:
-
- Network files While the Main menu display always appears as a
- ============= hierarchy, it's a true network as it support loops,
- super-sets, and dual-path browsing. However, to keep
- users from being confused, PC-Hypertext displays only a
- hierarchical view as it remembers the paths selected
- that lead into the network then retraces that path back
- out when the LEFT arrow or DEL keys are pressed.
-
- This approach is similar to unrolling string while
- exploring underground caves to prevent disorientation.
-
- DOS/Program calls With such calls, PC-Hypertext saves needed location
- ================= variables and then exits from memory. This leaves completely free system for use by the called programs
- all of memory free for the called program. When
- finished with the called program, PC-Hypertext
- automatically reloads itself and returns to display
- prior to the exit.
-
- Construction The ease of modifying cross-reference links in
- ============= PC-Hypertext may wrongfully lead users to think that is
- how hypertext systems are built. Hypertext construction
- depends mostly on the classification and categorization
- of large numbers of files and cross-links from many
- different dimensions.
-
- Hypertext construction is taking information apart, then
- making it easy for users to quickly reassemble the needed
- information from whatever viewpoint they desire.
- PC-Hypertext aids only portions of this construction
- process.
-
- Information PC-Hypertext contains security system to aid developers
- Validation and users. For developers, the primary value they add
- ========== is in identifying ideas and creating the network of
- paths that lead to each idea. While both MaxThink and
- Houdini create such networks, our HYPERLINK program
- contains programs (M2H and H2H) that translate such files
- into the binary network files used by PC-Hypertext.
-
- In addition, when the PC-Hypertext program loads, it
- checks the system to insure the intended files are
- available. Finally, developers can set the system to
- notify users if any of the contained files have been
- modified. Together, these systems help protect the
- interests of the hypertext developer.
-
- With high-value information, users also need some
- guarantee that the information has not been accidentally
- or purposely modified from the intended formats.
- While any security system can be thwarted, the mentioned
- PC-Hypertext approach should satisfy the interests of
- both creators and users of hypertext knowledge.
-
- Auto subdirectory While MS-DOS allows 64,000 files per directory, file
- ================= access speed becomes unworkable above 200 files per
- directory. So, with any file access, PC-Hypertext first
- looks for the requested file in a directory consisting
- of the first three letters of the filename. If that
- directory does not exist, then the program searches the
- current directory for the requested file. This approach
- lets developers create flat or hierarchical file systems.
-
- Audio/visual The ALT-K command, which builds or plays back a log of
- Demonstration keystrokes, includes an unusual feature. The program
- ============= records both the keystrokes and the delays between each
- keystroke. Here's the reason why.
-
- I can make audio tapes (cassette format) containing
- instructions for use of PC-Hypertext such that during
- the playback, both the audio tape and visual actions
- on the computer screen are in sync. Neat!
-
- Neil Larson 1/16/88 GUIDE5
- 44 Rincon Rd., Kensington, CA 94707
- Copyright MaxThink 1988 -- Call 415-428-0104 for permission to reprint
-