Can an XSL template match in *ALL* modes?

Question

Is there a way to write an XSL 1.0 template which is matching in all modes?

Or do I have to write a separate template for every existing mode (including additional templates for modes being added in the future)?

Here is what I have:

<xsl:apply-templates mode="mode1" />
    ...
<xsl:apply-templates mode="mode2" />
    ...
<!-- Do not process text content of nodes no matter in what mode -->
<!-- Is there a way to have only one template here? -->
<xsl:template match="text()" mode="mode1" />
<xsl:template match="text()" mode="mode2" />

Answer 1

The predefined mode: #all (only available in XSLT 2.0 however).

edit: replicating shared mode behaviour with 1.0

<xsl:template match="/">
    <xsl:variable name="choice" select="'a'"/><!-- input seed here -->
    <xsl:choose>
        <xsl:when test="$choice='a'">
            <xsl:apply-templates mode="a"/>
        </xsl:when>
        <xsl:when test="$choice='b'">
            <xsl:apply-templates mode="b"/>
        </xsl:when>
    </xsl:choose>
</xsl:template>

<xsl:template match="*" mode="a">
    [A]
    <xsl:apply-templates />
</xsl:template>

<xsl:template match="*" mode="b">
    [B]
    <xsl:apply-templates />
</xsl:template>

<xsl:template match="text()">
    [ALL]
</xsl:template>

Answer 2

Is there a way to write an XSL 1.0 template which is matching in all modes

Yes, in order to do this one should follow these two rules:

1. Write your template without a mode attribute.

2. Within the moded templates have an <xsl:apply-templates> instruction without a mode attribute that will result in the template in 1. above being selected for processing

This follows directly from the XSLT 1.0 spec, which says:

If an xsl:apply-templates element has a mode attribute, then it applies only to those template rules from xsl:template elements that have a mode attribute with the same value; if an xsl:apply-templates element does not have a mode attribute, then it applies only to those template rules from xsl:template elements that do not have a mode attribute.

To summarise: A set of templates each in a different mode can still issue <xsl:apply-templates> in such a way (described above), so that the same specific, single template will be selected for processing in each case.