> For the complete documentation index, see [llms.txt](https://help.cabi.org/cabi-digital-library-help/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.cabi.org/cabi-digital-library-help/search/advanced-search.md). # Advanced Search The Advanced search page enables the building of complex search queries across specific fields using multiple search boxes which can be linked together with Boolean operators (AND, OR, NOT). * It is possible to add as many additional search rows as needed to the entry form. * Searching on ‘All fields’ searches across all database fields. * There are three Compound fields which enable searching across selected multiple fields at the same time: * Authors/Contributors – searches across authors, editors as well as corporate author * Title – searches across article title fields (both original language as well as translated English title) * Indexing Term – searches across all indexing fields in one go – Descriptors, Identifiers, Organism Descriptors, Geographic Location and Broad Term * To search by language please use the two digit ISO 639-1 codes which may be found here: It is also possible to specify search limits using a variety of filters: * Creation Date – the date when the content was uploaded to CABI’s platform. For databases this is the date when the abstract was uploaded by CABI. In contrast the “Year” field in the Advanced Search field drop down can be used to search the year of publication of the original article or full text, rather than that of its corresponding abstract. * Publication type of Abstract Record – limits results to specific types of content such as journal articles or conference proceedings * Open access content or subscribed only content (Note that this refers to the access status of the item hosted in CABI Digital Library and not to the source content in case of our abstract records. To filter on Open Access source content, you can use the ['Limit to: Open Access available](/cabi-digital-library-help/search/special-search-filter-options.md)' filter on the search results page).

Advanced Search Screen

{% hint style="info" %} **Note**: For guidance on using parentheses `( )` with Boolean operators to structure complex searches, see {% endhint %} --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://help.cabi.org/cabi-digital-library-help/search/advanced-search.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.