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Understanding Input Ports

Stylus Studio interprets input ports differently for different XSLT instructions, as shown in Table 56:

XSLT Instruction
Meaning of Input Port
xsl:value-of
 
Used to define the value of the select attribute. For example:
<xsl:value-of select="'Owen'">
xsl:for-each
 
Used to define the XPath expression for the select attribute. For example:
<xsl:for-each select="books/book">
xsl:if
 
Used to define the value of the test attribute. For example:
<xsl:if test="authors/author= 'Henry'">
See xsl:if and xsl:choose to learn more about when to use this instruction.
xsl:choose
 
Used to define the value of the test attribute of the nested xsl:when element. For example:
<xsl:when test="contains(authors/author,'Marchese')">
See xsl:if and xsl:choose to learn more about when to use this instruction.
xsl:apply-templates
 
Used to define the value of the select attribute. For example:
<xsl:apply-templates select="subject"/>
xsl:call-template
 
Used to define the value of the name attribute. For example:
<xsl:call-template name="newAuthorsTemplate"/>
Table 56. XSLT Instruction Blocks in XSLT Mapper

Specifying Values for Input Ports

You can specify values for input ports by:

  • Dragging a link from a source document node or from the output port of another block (like that of an XPath function or If block, for example).
  • Double-clicking the port and typing a value (a string or an XPath expression, for example) in the Value dialog box.

Tip

 

When you mouse over an input port, Stylus Studio displays the value associated with that port.

Red Input Ports

If an xsl: instruction's attribute takes a literal or string value (such as xsl:value-of select="'Recommended'"/, for example) and a value has been provided for the attribute, Stylus Studio fills the input port associated with that attribute with a deep red to indicate that a value has been specified.

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