Template:Nk/doc

Use
This template prefixes text with an invisible sort key based upon a real number for use in sortable tables with mixed numbers and text or just text. This template maintains a valid sort order with an accuracy of one part in 10,000,000,000 in the ranges 1e-300 to 1e300 and -1e-300 to -1e300.

The syntax of this template is: where:
 * var1 = any real number (may contain thousands separators), &infin;, 1/&infin;, -1/&infin;, -&infin;, INF, 1/INF, -1/INF, -INF, IND, indeterminate, UND, undefined, UNK, unknown, NA, not applicable, or not available.
 * var2 = optional text to display (default = var1)
 * NOTE: If var2 is $, &pound;, &euro;, #, or No., var2 is prefixed to var1

The use of this template is illustrated in the sortable table below: