programmatically determined (programmatically determinable)

  determined by software from author-supplied data provided in a way that different user agents, including assistive technologies, can extract and present this information to users in different modalities

  Determined in a markup language from elements and attributes that are accessed directly by commonly available assistive technology.

  Determined from technology-specific data structures in a non-markup language and exposed to assistive technology via an accessibility API that is supported by commonly available assistive technology.