Up: Conventions for Locators
The ID portion of a page image locator is formed by concatenating the
ID for the text to which it is related with a two digit image series
number (range 01-99) and a variable length image number. The image
number is zero-padded so that it will always be the same length for a
particular image series. The parts of the ID portion are separated by
a forward slash character. The extension portion will vary with the
image type (e.g., .jpg, .gif).
In a case where a new ID must be assigned after images have already
been numbered sequentially, one or more letters may be appended to the
image number (grammar: [a-z]+).
Examples: JPEG image 101 in image series 02 of text 049 will have
locator 049/02/101.jpg; JPEG image 101a in image series 02 of
text 049 will have locator 049/02/101a.jpg.
Malcolm D. Hyman