How to make a whitespace in XSL?

[Matt]

In XSL, if I want to make a whitespace, I put   but not work. How
to make a space??

The following won't create any spaces. It will output mytitlemyauthor

<xsl:value-of select="title"> <xsl:value-of select="author">

But the following will output mytitle++myauthor:
<xsl:value-of select="title">++<xsl:value-of select="author">

any ideas? please advise. thanks!!

[David Carlisle]

<xsl:text> </xsl:text>

will make three spaces.

You mentioned nbsp which is the html entity for non breaking space.
that's character 160 so you could use
<xsl:value-of select="title">   <xsl:value-of select="author">
to get that (which would most likely be serialised using the nbsp
entity in html output)

Note however calling nbsp white space is rather misleading, it explictly
is not white space according to both the xML and HTML recommendations.
It is not allowed in places "whitespace" is allowed (such as between
attributes, or to indent elements in element-only content).

David