October 1, 1979 FRESS COMMANDS BLOCK TRAIL DISCRETE
Display


BTD


• BTD Block Trail Discrete ____________________________
BTDISCRETE creates a discrete (non-continuous) Trail of all
Blocks whose Keywords satisfy the boolean request. Except as
noted below, BTDISCRETE has the same characteristics as
BTCONTINUOUS.


BTDiscrete <bool>° <wind>°


NOTES _____
• A discrete Trail contains the same Blocks as a continuous
Trail, but it displays them singly in their normal context in
the file instead of in a chain.
• The user must specifically request to go the next (or previous
Block using TRAIL.
• SCROLLing through the end of a Block is permitted, but TRAIL
must be issued to return to the discrete Trail.
• See BTCONTINUOUS for more information.
MESSAGES ________
• Error messages occur when 1) all Keyworded Blocks are
requested, 2) a Keyword requested is not in the file, or 3) the
request is syntactically incorrect (mismatched parentheses, two
&'s in a row, etc.).
RELATED COMMANDS ________________
BTCONTINUOUS, TRAIL
124 -- Section 5 Release 9.1 FRESS Resource Manual