# XSLT function-available() Function
* * Complete XSLT Function Reference Object](#)
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## Definition and Usage
The function-available() function returns a boolean value indicating whether the XSLT processor supports the specified function.
You can test both XSLT functions and inherited XPath functions.
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## Syntax
boolean function-available(string)
## Parameters
| Parameter | Description |
| :--- | :--- |
| string | Required. Specifies the function to test. |
### Example 1
sum() is supported.
sum() is not supported.
current() is supported.
current() is not supported.
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* * Complete XSLT Function Reference Object](#)