Established in 2007, <odesi> (Ontario Data Documentation, Extraction Service and Infrastructure) is a digital repository for social science data, including polling data. It is a web-based data exploration, extraction and analysis tool that uses the Data Documentation Initiative (DDI) social science data standard.

<odesi> provides researchers the ability to search for survey questions (variables) across thousands of datasets. There are both microdata and aggregate data available, in a range of formats.

The datasets available in <odesi> are available to individuals affiliated with OCUL member institutions only at this time, including Carleton University. However, anyone can use the <odesi> search functionality and freely available metadata to identify datasets of interest to them. They can then contact the data producer directly for information on obtaining access to the data.