Returns a numeric code indicating the type of contents of specified element (or parent element of specified node in case specified node is not an element). Returns -1 when this content type cannot be determined.

Parameter node defaults to the context element (or the parent element of the context node if the context node is not an element).

Code	Description
0	Empty.
1	Whitespace only. Non-breaking space characters ( ) are considered to be whitespace.
2	Element only.
3	Elements and whitespace.
4	Text other than whitespace (words) but no elements.
6	Words and elements.

Returns the index of the CSS rule having specified selector. Returns -1 if such rule is not found in the document being edited.

For this function to work, command parse-styles must have been invoked in order to “intern” all the CSS rules found in the document being edited.

The string argument specifies the selector of a CSS rule.

Let's suppose the document being edited contains:

<style>
...
/* First character class rule is rule #43. */
.c-Important {
    color: #FF0000;
    font-weight: bold;
}

.c-Code {
    font-family: "Courier New";
    font-size: 9pt;
}
...
</style>

See also get-rule.

Related commands: add-rule, remove-rule, set-rule.

Equivalent to length(lookup-style("font-size", node)), but specifically adapted to the font-size CSS property (for example,it supports a font size expressed as a percentage).

Returns specified CSS class of specified element (or parent element of specified node in case specified node is not an element). Returns empty string "" when the element does not have specified class.

This function differs from @class=string in that it searches for CSS classes “interned” by the parse-styles editing command.

Parameter node defaults to the context element (or the parent element of the context node if the context node is not an element).

The first string argument specifies which CSS classes to search for. The first string argument defaults to the empty string "", which means: all classes.

Let's suppose the element which is the argument of this function has the following interned CSS classes "p-Normal pn-1-0 n-1-0".

Related commands: add-class, remove-class.

Returns the value of specified CSS style property if found in CSS rule having specified selector. Returns the empty string "" if specified rule is not found in the document being edited or if it does not contain specified property.

For this function to work, command parse-styles must have been invoked in order to “intern” all the CSS rules found in the document being edited.

The first string argument specifies the selector of a CSS rule.

The second string argument specifies the name of a CSS style property. The empty string "" means: all the properties of the CSS rule.

Let's suppose the document being edited contains:

<style>
...
/* First character class rule is rule #43. */
.c-Important {
    color: #FF0000;
    font-weight: bold;
}

.c-Code {
    font-family: "Courier New";
    font-size: 9pt;
}
...
</style>

See also find-rule.

Related commands: add-rule, remove-rule, set-rule.

Returns the value of specified CSS style property if directly set on specified element (or parent element of specified node in case specified node is not an element). Returns empty string "" when the element has no such direct CSS style property.

This function differs from substring-after(@style, concat(string, ":")) in that it searches for CSS style properties “interned” by the parse-styles editing command.

Parameter node defaults to the context element (or the parent element of the context node if the context node is not an element).

The first argument string specifies the name of a CSS style property.

Examples: let's suppose the element which is the argument of this function has the following interned CSS style properties "color: #FF0000; font-size: 9pt;", get-style("font-family") return ""; get-style("color") returns "#FF0000".

See also style-count, lookup-style.

Related commands: set-style.

Returns true() is specified string contains the name of at least one monospaced font family; return false() otherwise.

Examples: is-monospaced("Calibri") return false(); is-monospaced("monospace") return true(); is-monospaced("'Courier New', 'Lucida Console'") return true().

Converts first string argument, a CSS length value, to a number of points. Returns NaN if specified string cannot be parsed as a CSS length.

Parameter node defaults to the context element (or the parent element of the context node if the context node is not an element). The context element is needed to convert relative lengths such as "1.1em" to points.

Examples: length("") returns NaN; length("12pt") returns 12; length("12") returns 9 (implicit px unit; px are converted to pt assuming a 96DPI screen resolution).

See also lookup-length.

Strictly equivalent to length(lookup-style(string, node)).

Similar to get-style(string, node), except that the whole CSS cascade is searched for the CSS style property specified by the first string argument. While get-style limits its search to the CSS style properties directly set on the element, lookup-style

until searched CSS style property is found.

Function lookup-style is efficient because it works on CSS style properties, CSS classes and CSS rules “interned” by the parse-styles editing command.

See also lookup-length.

Related commands: add-rule, remove-rule, set-rule, set-style.

Concatenates specified strings and converts the result of this concatenation to an OR regular expression pattern. Returns specified string as is if passed a single string containing a single token.

This helper function is often used in conjunction with get-class to return the class matching one of several alternative classes.

Examples: or-regex("foo") returns "foo"; or-regex("foo bar") returns "^((foo)|(bar))$"; or-regex("foo bar", "gee") returns "^((foo)|(bar)|(gee))$".

Converts first argument to an XML ID. For example, returns "_first_then_2_second" for "1 first then 2 second". Note that there is no guarantee that the returned ID is unique within a document.

The optional second argument specifies the maximum length of the returned ID. Its default value is 40.

Returns the number of CSS style properties directly set on specified element (or parent element of specified node in case specified node is not an element). Returns 0 when the element has no direct CSS style properties.

This function differs from count(tokenize(@style, "\s+")) in that it counts CSS style properties “interned” by the parse-styles editing command.

Parameter node defaults to the context element (or the parent element of the context node if the context node is not an element).

Example: let's suppose the element which is the argument of this function has the following interned CSS style properties "color: #FF0000; font-size: 9pt;", this function would return 2.

See also get-style.

Related commands: set-style.

First argument is a key name. Second argument is a key value. Returns second argument as is if the key map having a name equals to first argument does not contain this value. If the key map already contains this value then a suffix ("-2", "-3", "-4", etc) is automatically appended to second argument in order to obtain a new value which is not contained in the key map.

Example: unique-key-value("ids", "Reference"). If key map "ids" does not contain "Reference", unique-key-value() returns "Reference"; otherwise, if key map "ids" does not contain "Reference-2", unique-key-value() returns "Reference-2"; otherwise, if key map "ids" does not contain "Reference-3", unique-key-value() returns "Reference-3", etc.