> For the complete documentation index, see [llms.txt](https://indexone.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://indexone.gitbook.io/docs/product-guides/reference-data/attributes-and-filters.md).

# Attributes and Filters

Read the section below to learn about the various attributes and filters in the index builder.

In order to build your index, you can use the in-built filters on the index builder to narrow down your list of securities. Below is a table that explains the relevant filters you need to finalize your list of securities.

<table><thead><tr><th width="188">Attributes/ Filters</th><th width="171.33333333333331">Name</th><th>Definition</th></tr></thead><tbody><tr><td>Attributes</td><td>issue type</td><td>indicates the type of financial instrument chosen for the index</td></tr><tr><td></td><td>sector</td><td>indicates the sector of the economy that the chosen securities operate in according to NAICS framework</td></tr><tr><td></td><td>industry</td><td>indicates the industry that the chosen securities operate in according to NAICS framework</td></tr><tr><td></td><td>market cap</td><td>indicates the market capitalization of the security, calculated as price per share multiplied by shares outstanding</td></tr><tr><td></td><td>country</td><td>indicates the country of domicile of securities</td></tr><tr><td></td><td>region</td><td>indicates the country of exchange listing of securities</td></tr><tr><td></td><td>currency</td><td>indicates the currency which the security is traded in</td></tr><tr><td></td><td>exchange code</td><td>indicates the exchange MIC code of the security</td></tr><tr><td>Filters</td><td>equals</td><td>must be equal to the selected value</td></tr><tr><td></td><td>in</td><td>must be equal to any of the selected values</td></tr><tr><td></td><td>limit_ascending</td><td>ranks the universe by the selected attribute in ascending order, and limits the universe by the top N observations depending on the specified value</td></tr><tr><td></td><td>limit_descending</td><td>ranks the universe by the selected attribute in descending order, and limits the universe by the top N observations depending on the specified value</td></tr></tbody></table>