# Other functions ## xxf:decode-iso9075-14() ``` xxf:decode-iso9075-14($value as xs:string) as xs:string ``` The `xxf:decode-iso9075-14()` function decodes a string according to ISO 9075-14:2003. ## xxf:doc-base64() ``` xxf:doc-base64($href as xs:string) as xs:string ``` The `xxf:doc-base64()` function reads a resource identified by the given URL, and returns the content of the file as a Base64-encoded string. It is a dynamic XPath error if the resource cannot be read. ## xxf:doc-base64-available() ``` xxf:doc-base64-available($href as xs:string) as xs:boolean ``` The `xxf:doc-base64-available()` function reads a resource identified by the given URL. It returns `true()` if the file can be read, `false()` otherwise. ## xxf:encode-iso9075-14() ``` xxf:encode-iso9075-14($value as xs:string) as xs:string ``` The `xxf:encode-iso9075-14()` function encodes a string according to ISO 9075-14:2003. The purpose is to escape any character which is not valid in an XML name. ## xxf:image-metadata() \[SINCE Orbeon Forms 4.4] ``` xxf:image-metadata($content as xs:anyURI, $name as xs:string) as xs:item? ``` Access basic image metadata. The function returns the empty sequence if the URL is empty or the metadata requested is not found. * `$content`: URL pointing to an image * `$name`: metadata property name * `width`: image width in pixels, returns an `xs:integer` if found * `height`: image height in pixels, returns an `xs:integer` if found * `mediatype`: image mediatype based on the content, returns an `xs:string` of `image/jpeg`, `image/png`, `image/gif` or `image/bmp` (the formats universally supported by browsers) if found *NOTE: The function dereferences the content of the URL when called. Accesses to local files are likely to be faster than remote files.* The following example validates that the image is within 10% of a 1x1 aspect ratio: ```markup ```