Examples

The following expression returns <s>Now</s>.

<substr>
   <s>Now is the time</s>
   <i>0</i>
   <i>3</i>
</substr>

In the following example, the start attribute is missing, but is assumed to be 0:

<block>
    <substr l=’4’>
        <s>Hello World</s> --> Hello World
    </substr> --> Hell
</block> --> Hell

The length argument is also optional. A missing length argument causes the function to extract the rest of the string. length can be unspecified when only the string and start arguments are specified a child nodes of substr such as:

<substr>
    <s>Hello World</s>
        <i>3</i>
<substr>

or when the l attribute is missing from the substr node like. Note that the length argument is unspecified below, but the rest of the string starting from this start is returned:

<block>
    <substr s=’3’>
       <s>Hello World</s> --> Hello World
    </substr> --> lo World
</block> --> lo World