Identifying a Timeline Image - LiteratureInContext/LiC-data GitHub Wiki

To connect an image to the timeline, you'll be adding an attribute @timeline to the selected image that is in use in your xml file. For instance, in Mary Shelley's Frankenstein, Shelley's portrait, which is used in an annotation, appears in the timeline. See the following encoding, noting specifically the bolded segment:

   <graphic **type="timeline"** url="notes/Mary-Shelley.jpg" 
    source="https://collectionimages.npg.org.uk/large/mw05761/Mary-Wollstonecraft-Shelley.jpg" 
    alt="A portrait of Mary Shelley, painted by Richard Rothwell (1840), showing a white 
    woman in a black early Victorian gown and typical hairstyle, against an abstracted 
    domestic interior." desc="Portrait of Mary Shelley (1840), by Richard Rothwell, via 
    the National Portrait Gallery (UK)."/>

The @desc attribute that provides the image caption in the annotation also appears as the caption in the timeline.