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0.1.3.4. Automatic cross-referencing of your code
Your code may also be automatically cross-referenced; again, it's
based on finding "interesting things" in your code; furthermore, it
depends on distinguishing between "definitions" and "uses",
because the main purpose of cross-referencing is to let you move quickly
from a "use" (e.g., of a function) to its "definition".
APRIL91: Sometimes you would really like to be able to go from a
definition to all of its uses. Perhaps this should be an option.
Cross-referencing is automatically OFF when producing LaTeX
documents (we found it mainly cluttered) and ON when producing Info
files (which lets you jump to the definitions through a node's menu).