Lettie Y. Conrad writes: “Library discovery services—web-scale search engines configured for institutional library holdings—first came onto the scholarly communications scene in the mid-2000s. Just as the indexing and relevancy engines found under the hood of commercial search engines are not easily understood, our industry quickly found that what goes into library discovery services is equally mysterious. Enter NISO, our sector’s best bet for tackling thorny topics like this. Initiated in 2011, NISO’s Open Discovery Initiative (ODI) offers standard terms of engagement for the creation and implementation of pre-indexed discovery tools for academic libraries.