I'm trying to add the alternate text into my images just as the Apache FOP documentation instructs: By using fox-alt:-text.
<fo:external-graphic src="logo.gif" content-width="75%" content-height="75%" fox:alt-text="My company logo"/>
I'm using Apache FOP version 2.5 and accessibility is ON (setted true in fop.xconf). For some reason I'm getting an error message saying
org.xml.sax.SAXParseException:cvc-complex-type.3.2.2: Attribute 'fox:alt-text' is not allowed to appear in element 'fo:external-graphic'.
Any ideas on what might be wrong?
I now realized that the problem is not in Apache FOP but it's in my code. Our system is doing some additional schema validation (javax.xml.validation.Validator) against the plain fo schema and doesn't see the fox extension.
fox:alt-text is not a part of the original fo schema's fo:external-graphic definition and is causing validation failures.