The numeric passage indicator sets numeric mode and grade 1 mode for all text until the terminator is reached.

Select the groupsign which more nearly approximates the usual pronunciation of the word and which does not distort the form of the word.

The numeric terminator follows immediately after the last affected symbols-sequence, except as in 6.9.4 below.

With the exception of 10.10.6 above, use the strong groupsigns and the lower groupsigns in preference to the initial-letter contractions and the final-letter groupsigns provided their use does not waste space. [Space-saving takes precedence over this rule.]

Numeric indicators are not used in a numeric passage and any lowercase letter a-j is preceded by a grade 1 indicator.

Use the final-letter groupsign for "ence" in the letters-sequences "encea", "enced" and "encer".

To preserve the general format of the enclosed text the numeric passage indicator may be placed by itself on a line above and the terminator on a line below the text.

Note: A numeric passage may be useful in cases such as a long worked example in mathematics, a series of arithmetic exercises, or a table with mostly numeric content.

Refer to: Guidelines for Technical Material, Part 4, for spatial arithmetic examples illustrating the use of both the spaced numeric indicator and the numeric passage indicator.

With the exception of 10.10.4 above, use the strong groupsigns in preference to the lower groupsigns.

Avoid division of a number between lines unless considerable space is saved. If division is necessary use the appropriate line continuation indicator and observe the following rules.

When it is necessary to break a long number across lines, place the break in a logical place--at a numeric space, or after a comma which is being used as a separator--not between two digits.