The Community of Practice maintains a “Linked Data Development in Ex Libris Products” Dashboard at https://docs.google.com/document/u/1/d/e/2PACX-1vSYlQCkfBM-6jqAYUruFRVwk672OBeKG0c7CpwmIBtyw0QTpyJKiL4ORY3dtie9XpW1DB-IcnjLzOc1/pub which lists the current or proposed LOD developments in Ex Libris products. It is regularly updated. So for up to date information it is a good starting point.
The group recently wrote a report about URIs in Ex Libris Products, which can be viewed here: http://documents.el-una.org/2097/
We also run Town Hall meetings during the year. These are recorded to allow access to them in various time zones. You can find them under the Events link from the LOD CoP front page.
Town Hall Meetings
LOD Working Group now seeking User Stories/Use cases for linked data from Ex Libris customers. If you have ideas or user stories, please submit them using the Google form (https://docs.google.com/forms/d/e/1FAIpQLSekrf8BVU-51xdjJp8lWtYDuL46zGnyEmL7_8hQBv9BvFNaUA/viewform).
A classic article by Tim Berners-Lee Linked Open Data: “Is Your Data 5*?”
Another rich resource is the SWIB (Semantic Web in Libraries) conference which for the last couple of years has been held online. Last year’s presentations are available from: http://swib.org/swib21/
A presentation introducing linked open data from a SWIB workshop outlines the basics
Ex Libris Tech Blog
The Ex Libris Developer Network also has information on work undertaken by both the Company and customers. A recent development on Using the Linked Data Integration API to Enhance Discovery is documented.