> For the complete documentation index, see [llms.txt](https://chembl.gitbook.io/surechembl/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://chembl.gitbook.io/surechembl/text-search/search-interface-overview.md). # Search interface overview When you access the SureChEMBL landing page, the search interface is displayed. It enables you to perform various types of searches.
| Element | Description | | ------------------------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Query field |

A freestyle search field for performing either a simple text search or a more complex Solr query search.

Note: See Solr query fields and examples for more details on the Solr query fields

| | All chemically annotated authorities | A filter for selecting all or only the relevant chemically annotated patent authorities among US Applications, US Granted, EP Applications, EP Granted, JP, WO, CN | | Patents with small molecules | An in-house filter based on the work of [Falaguera and Mestres](https://pubs.acs.org/doi/10.1021/acs.jcim.1c00151) | | Specify dates |

A mechanism for selecting documents based on the publication date.

Note: See Date filter for more details on how to restrain the patent search on a time period

| | Query assistant |

An component aiming to support users in writing queries.

Note: See Query assistant for more details.

| | Structure search |

Ketcher, a web-based chemical structure editor.

Note: See Chemical search for more details on the search by structure

| ***Simple text search*** * Provide the desired search text, and filtering. * Click on **Search**.\ The system returns quickly the search results.