<xsl:preserve-space elements= />

• Preserves whitespace-only text nodes in the input document
• This is the default action anyway
• Tends to be used in conjunction with xsl:strip-space
• Takes precedence over xsl:strip-space

<xsl:strip-space elements="*" />
<xsl:preserve-space elements="table thead tbody tr td th" />

If this was an XTML document, whitespace would be stripped apart from the whitespace within a table

In XSLT, space (#x20), horizontal tab (#x9), carriage return (#xD) and line feed (#xA) are considered white space.