The inaugural 2018 University of California Digital Library Forum (UC DLFx), "Building the UC Digital Library: Theory and Practice," took place February 27th to March 1st at UC Riverside. The conference brought together librarians, digital technology experts, educators, policy-makers, and research support staff from the UC campuses and the California Digital Library. Participants discussed and explored how libraries and research support departments are engaging with the constantly changing and challenging world of data and digital scholarship.