How Landmark IDs Work

During output generation, ePublisher creates a deterministic 16-character hash ID for each significant content element using the BLAKE2b hashing algorithm.

Landmark Index File

IDs are stored in a landmark index file (<Group>_lx.js) alongside other index files at the group root. This file maps each Landmark ID to its corresponding page URL and anchor.

JavaScript Runtime Lookup

When a user visits a Landmark URL, the Reverb JavaScript runtime looks up the Landmark ID in the index file and redirects the browser to the actual page URL.

Browser Address Bar

After redirection, the browser address bar displays the actual page URL, which can be bookmarked and loaded directly without JavaScript.

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Last modified date: 01/21/2026