Why does:
<xsl:template match="person/text()">
David
<xsl:apply-templates/>
</xsl:template>
easily overwrite all <person> text nodes with the value "David",..
It's a bit hard to know exactly what you mean here, but I suspect that
the answer is: "it doesn't".
person nodes are element nodes not text nodes, and text nodes have no
name. I suspect you mean text nodes that are children of person
elements.
Note that a template never does anything unless it is applied, so the
above does nothing unless the template for person elements calls
apply-templates on its child text nodes. If it does then _each_ such
text node will generate a newline a tab David a newline and another
tab.
the xsl:apply-templates in teh above will never generate anything as it
does nothave a select attribute so applies templates to the children of
the text node, and text nodes never have children.
but
<xsl:template match="person/text()[.="Peter"]">
David
<xsl:apply-templates/>
</xsl:template>
Not overwrite every <person>Peter</person> with
<person>David</person>????
The same comments apply here, this will match the text node that you
indicate, although it has the same priority as the first template so if
they are both there that's an error although the system may recover by
just using one of them, you may want to add priority="10".
<xsl:template match="person/text()[.="Peter"]" priority="10">
<xsl:text>David</xsl:text/>
</xsl:template>
again unless the template for match="person" applies templates to its
children this will have no effect.
David
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