speakable property
1.) id-value URL references - uses id-value of an element in
the page being annotated The simplest use of speakable has
(potentially relative) URL values, referencing identified
sections of the document concerned 2.) CSS Selectors -
addresses content in the annotated page, e.g via class attribute
Use the [cssSelector] property 3.) XPaths - addresses content
via XPaths (assuming an XML view of the content) Use the
[xpath] property For more sophisticated markup of speakable
sections beyond simple ID references, either CSS selectors or
XPath expressions to pick out document section(s) as speakable
For this we define a supporting type, [SpeakableSpecification]
which is defined to be a possible value of the speakable
property Supported types: SpeakableSpecification, String
Implementation
dynamic speakable;