These pages are designed to be transcluded into sections of other pages. For best formatting, a transcluded page should not include headers since the level of the header is not dynamic to the page in which it is transcluded. To add a page to this category, add the following to the last line of the page:
<noinclude> [[Category:Transcludable pages]] </noinclude>
If only a value or small amount of information is being transcluded, consider creating a template on a sub page of a relevant page and link it to Category:Guideline properties.