# Filters and helpful documents

<table data-view="cards"><thead><tr><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td>📘 Scope of coverage </td><td><a href="filters-and-helpful-documents/scope-of-coverage">scope-of-coverage</a></td></tr><tr><td>📘 List of operators to create a topic</td><td><a href="filters-and-helpful-documents/list-of-operators-to-create-a-topic">list-of-operators-to-create-a-topic</a></td></tr><tr><td>📘 List of operators to add filters</td><td><a href="filters-and-helpful-documents/list-of-operators-to-add-filters">list-of-operators-to-add-filters</a></td></tr><tr><td>📘 Quicktrends operators list</td><td><a href="filters-and-helpful-documents/quicktrends-operator-list">quicktrends-operator-list</a></td></tr><tr><td>📘 List of languages</td><td><a href="filters-and-helpful-documents/list-of-languages">list-of-languages</a></td></tr></tbody></table>