$v:toc-close
$v:toc-close — Persistent ToC close button.
Variable:
{http://docbook.org/ns/docbook/variables}toc-close
Defined in:
modules/variable.xsl
Used in:
modules/chunk-output.xsl
Synopsis
  |<xsl:variable name="v:toc-close"
  |               as="element()">
  |   <span>╳</span>
  |</xsl:variable>
Description
The contents of this variable will be rendered as the “close” icon for the persistent ToC.