Update index.md

Clarifying wording about adding xrefs

Author: kristenORM

styleguide/index.md

@@ -332,7 +332,7 @@ title: O'Reilly Style Guide
 <section data-type="sect2" id="figures_tables_and_examples">
 <h2>Figures, Tables, and Examples</h2>
 
-<p>Every figure, table, and example should be preceded by a specific in-text reference (for example: see Figure 99-1; Example 1-99 shows; Table 1-1 lists, etc.). Figures, tables, and examples should not be introduced with colons or phrases like “in the following figure,” or “as shown in this table.” Lack of specific in-text references may cause incorrect placement of figures. <strong>See <a href="#cross_references">Cross References</a> above for more detail on including cross references.</strong></p>
+<p>Every formally numbered figure, table, and example should be preceded by a specific in-text reference (for example: see Figure 99-1; Example 1-99 shows; Table 1-1 lists, etc.). Formal figures, tables, and examples should not be introduced with colons or phrases like “in the following figure,” or “as shown in this table.” Though we do support unnumbered informal figures/tables/examples, these should be used only for elements whose contents are not discussed at length or referred back to. Lack of specific in-text references may cause incorrect placement of figures. <strong>See <a href="#cross_references">Cross References</a> above for more detail on including cross references.</strong></p>
 
 <div data-type="tip">
 <p>If you are writing or copyediting in Word, figure, table, and example numbers should be numbered as follows: 1-2 (note hyphen [-], not en dash [–] between numbers). The first number is the chapter number. This will be soft-coded in production if not during the writing process.</p>