# UniChem 2.0

## UniChem

- [Introduction](https://chembl.gitbook.io/unichem/master.md)
- [What's new?](https://chembl.gitbook.io/unichem/whats-new.md)
- [Web application](https://chembl.gitbook.io/unichem/web-application.md): /unichem/beta
- [Compound Sources Search](https://chembl.gitbook.io/unichem/web-application/compound-sources-search.md)
- [Connectivity Search](https://chembl.gitbook.io/unichem/web-application/connectivity-search.md)
- [Similarity Search](https://chembl.gitbook.io/unichem/web-application/similarity-search.md)
- [Query field requirements](https://chembl.gitbook.io/unichem/web-application/formatting-of-input-data-for-unichem-queries..md)
- [API](https://chembl.gitbook.io/unichem/api.md): The API Command documentation for UniChem 2.0
- [Sources](https://chembl.gitbook.io/unichem/api/sources.md)
- [Compound Search](https://chembl.gitbook.io/unichem/api/compound-search.md)
- [Connectivity Search](https://chembl.gitbook.io/unichem/api/connectivity-search.md)
- [Legacy](https://chembl.gitbook.io/unichem/api/legacy.md): Backwards compatibility services
- [Downloads](https://chembl.gitbook.io/unichem/downloads.md)
- [Submission of data to UniChem](https://chembl.gitbook.io/unichem/submission-of-data-to-unichem.md)
- [Reasons for data omission](https://chembl.gitbook.io/unichem/submission-of-data-to-unichem/rules-for-loading.md)
- [Getting in touch](https://chembl.gitbook.io/unichem/getting-in-touch.md)
- [Citing UniChem](https://chembl.gitbook.io/unichem/citing-unichem.md)
- [FAQs](https://chembl.gitbook.io/unichem/faqs.md)
- [Definitions](https://chembl.gitbook.io/unichem/definitions.md)
- [What is an Assignment?](https://chembl.gitbook.io/unichem/definitions/what-is-an-assignment.md)
- [What is meant by a 'src\_id' and a 'src\_compound\_id' in UniChem ?](https://chembl.gitbook.io/unichem/definitions/what-is-meant-by-a-src_id-and-a-src_compound_id-in-unichem.md)
- [Glossary of Terms](https://chembl.gitbook.io/unichem/definitions/glossary-of-terms.md)
- [Privacy notices](https://chembl.gitbook.io/unichem/privacy-notices.md): Find out what personal data is collected by the specific EMBL-EBI services you are requesting and for what purposes, as well as how your data are processed and kept secure.