<!DOCTYPE html> 
 
						
						
						
							
 
						
						
						
							< html  lang = "en"  data-content_root = "../../../" > 
 
						
						
						
							  < head > 
 
						
						
						
							    < meta  charset = "utf-8"  / > 
 
						
						
						
							    < meta  name = "viewport"  content = "width=device-width, initial-scale=1.0"  / > 
 
						
						
						
							  < meta  name = "viewport"  content = "width=device-width, initial-scale=1" > 
 
						
						
						
							    < title > NoSQL databases —  SearXNG Documentation (2025.2.9+a1e2b2546)< / title > 
 
						
						
						
							    < link  rel = "stylesheet"  type = "text/css"  href = "../../../_static/pygments.css?v=6625fa76"  / > 
 
						
						
						
							    < link  rel = "stylesheet"  type = "text/css"  href = "../../../_static/searxng.css?v=52e4ff28"  / > 
 
						
						
						
							    < script  src = "../../../_static/documentation_options.js?v=09da0b18" > < / script > 
 
						
						
						
							    < script  src = "../../../_static/doctools.js?v=9a2dae69" > < / script > 
 
						
						
						
							    < script  src = "../../../_static/sphinx_highlight.js?v=dc90522c" > < / script > 
 
						
						
						
							    < script  data-project = "searxng"  data-version = "2025.2.9+a1e2b2546"  src = "../../../_static/describe_version.js?v=fa7f30d0" > < / script > 
 
						
						
						
							    < link  rel = "index"  title = "Index"  href = "../../../genindex.html"  / > 
 
						
						
						
							    < link  rel = "search"  title = "Search"  href = "../../../search.html"  / > 
 
						
						
						
							    < link  rel = "next"  title = "Local Search APIs"  href = "search-indexer-engines.html"  / > 
 
						
						
						
							    < link  rel = "prev"  title = "Command Line Engines"  href = "command-line-engines.html"  / >  
 
						
						
						
							  < / head > < body > 
 
						
						
						
							    < div  class = "related"  role = "navigation"  aria-label = "Related" > 
 
						
						
						
							      < h3 > Navigation< / h3 > 
 
						
						
						
							      < ul > 
 
						
						
						
							        < li  class = "right"  style = "margin-right: 10px" > 
 
						
						
						
							          < a  href = "../../../genindex.html"  title = "General Index" 
 
						
						
						
							             accesskey = "I" > index< / a > < / li > 
 
						
						
						
							        < li  class = "right"  > 
 
						
						
						
							          < a  href = "../../../py-modindex.html"  title = "Python Module Index" 
 
						
						
						
							             > modules< / a >  |< / li > 
 
						
						
						
							        < li  class = "right"  > 
 
						
						
						
							          < a  href = "search-indexer-engines.html"  title = "Local Search APIs" 
 
						
						
						
							             accesskey = "N" > next< / a >  |< / li > 
 
						
						
						
							        < li  class = "right"  > 
 
						
						
						
							          < a  href = "command-line-engines.html"  title = "Command Line Engines" 
 
						
						
						
							             accesskey = "P" > previous< / a >  |< / li > 
 
						
						
						
							        < li  class = "nav-item nav-item-0" > < a  href = "../../../index.html" > SearXNG Documentation (2025.2.9+a1e2b2546)< / a >  » < / li > 
 
						
						
						
							          < li  class = "nav-item nav-item-1" > < a  href = "../../index.html"  > Developer documentation< / a >  » < / li > 
 
						
						
						
							          < li  class = "nav-item nav-item-2" > < a  href = "../index.html"  accesskey = "U" > Engine Implementations< / a >  » < / li > 
 
						
						
						
							        < li  class = "nav-item nav-item-this" > < a  href = "" > NoSQL databases< / a > < / li >  
 
						
						
						
							      < / ul > 
 
						
						
						
							    < / div >   
 
						
						
						
							
 
						
						
						
							    < div  class = "document" > 
 
						
						
						
							      < div  class = "documentwrapper" > 
 
						
						
						
							        < div  class = "bodywrapper" > 
 
						
						
						
							          < div  class = "body"  role = "main" > 
 
						
						
						
							            
 
						
						
						
							  < section  id = "nosql-databases" > 
 
						
						
						
							< span  id = "nosql-engines" > < / span > < h1 > NoSQL databases< a  class = "headerlink"  href = "#nosql-databases"  title = "Link to this heading" > ¶< / a > < / h1 > 
 
						
						
						
							< aside  class = "sidebar" > 
 
						
						
						
							< p  class = "sidebar-title" > further read< / p > 
 
						
						
						
							< ul  class = "simple" > 
 
						
						
						
							< li > < p > < a  class = "reference external"  href = "https://en.wikipedia.org/wiki/NoSQL" > NoSQL databases< / a > < / p > < / li > 
 
						
						
						
							< li > < p > < a  class = "reference external"  href = "https://redis.io/" > redis.io< / a > < / p > < / li > 
 
						
						
						
							< li > < p > < a  class = "reference external"  href = "https://www.mongodb.com" > MongoDB< / a > < / p > < / li > 
 
						
						
						
							< / ul > 
 
						
						
						
							< / aside > 
 
						
						
						
							< nav  class = "contents local"  id = "contents" > 
 
						
						
						
							< ul  class = "simple" > 
 
						
						
						
							< li > < p > < a  class = "reference internal"  href = "#extra-dependencies"  id = "id6" > Extra Dependencies< / a > < / p > < / li > 
 
						
						
						
							< li > < p > < a  class = "reference internal"  href = "#configure-the-engines"  id = "id7" > Configure the engines< / a > < / p > 
 
						
						
						
							< ul > 
 
						
						
						
							< li > < p > < a  class = "reference internal"  href = "#redis-server"  id = "id8" > Redis Server< / a > < / p > < / li > 
 
						
						
						
							< li > < p > < a  class = "reference internal"  href = "#engine-mongodb"  id = "id9" > MongoDB< / a > < / p > < / li > 
 
						
						
						
							< / ul > 
 
						
						
						
							< / li > 
 
						
						
						
							< / ul > 
 
						
						
						
							< / nav > 
 
						
						
						
							< aside  class = "sidebar" > 
 
						
						
						
							< p  class = "sidebar-title" > info< / p > 
 
						
						
						
							< p > Initial sponsored by < a  class = "reference external"  href = "https://nlnet.nl/discovery" > Search and Discovery Fund< / a >  of < a  class = "reference external"  href = "https://nlnet.nl/" > NLnet Foundation< / a > .< / p > 
 
						
						
						
							< / aside > 
 
						
						
						
							< p > The following < a  class = "reference external"  href = "https://en.wikipedia.org/wiki/NoSQL" > NoSQL databases< / a >  are supported:< / p > 
 
						
						
						
							< ul  class = "simple" > 
 
						
						
						
							< li > < p > < a  class = "reference internal"  href = "#engine-redis-server" > < span  class = "std std-ref" > Redis Server< / span > < / a > < / p > < / li > 
 
						
						
						
							< li > < p > < a  class = "reference internal"  href = "#engine-mongodb" > < span  class = "std std-ref" > MongoDB< / span > < / a > < / p > < / li > 
 
						
						
						
							< / ul > 
 
						
						
						
							< p > All of the engines above are just commented out in the < a  class = "extlink-origin reference external"  href = "https://github.com/searxng/searxng/blob/master/searx/settings.yml" > settings.yml< / a > , as you have to set various options and install
 
						
						
						
							dependencies before using them.< / p > 
 
						
						
						
							< p > By default, the engines use the < code  class = "docutils literal notranslate" > < span  class = "pre" > key-value< / span > < / code >  template for displaying results /
 
						
						
						
							see < a  class = "extlink-origin reference external"  href = "https://github.com/searxng/searxng/blob/master/searx/templates/simple/result_templates/key-value.html" > simple< / a > 
 
						
						
						
							theme.  If you are not satisfied with the original result layout, you can use
 
						
						
						
							your own template, set < code  class = "docutils literal notranslate" > < span  class = "pre" > result_template< / span > < / code >  attribute to < code  class = "docutils literal notranslate" > < span  class = "pre" > {template_name}< / span > < / code >  and
 
						
						
						
							place the templates at:< / p > 
 
						
						
						
							< div  class = "highlight-default notranslate" > < div  class = "highlight" > < pre > < span > < / span > < span  class = "n" > searx< / span > < span  class = "o" > /< / span > < span  class = "n" > templates< / span > < span  class = "o" > /< / span > < span  class = "p" > {< / span > < span  class = "n" > theme_name< / span > < span  class = "p" > }< / span > < span  class = "o" > /< / span > < span  class = "n" > result_templates< / span > < span  class = "o" > /< / span > < span  class = "p" > {< / span > < span  class = "n" > template_name< / span > < span  class = "p" > }< / span > 
 
						
						
						
							< / pre > < / div > 
 
						
						
						
							< / div > 
 
						
						
						
							< p > Furthermore, if you do not wish to expose these engines on a public instance, you
 
						
						
						
							can still add them and limit the access by setting < code  class = "docutils literal notranslate" > < span  class = "pre" > tokens< / span > < / code >  as described in
 
						
						
						
							section < a  class = "reference internal"  href = "../../../admin/settings/settings_engine.html#private-engines" > < span  class = "std std-ref" > Private Engines (tokens)< / span > < / a > .< / p > 
 
						
						
						
							< section  id = "extra-dependencies" > 
 
						
						
						
							< h2 > < a  class = "toc-backref"  href = "#id6"  role = "doc-backlink" > Extra Dependencies< / a > < a  class = "headerlink"  href = "#extra-dependencies"  title = "Link to this heading" > ¶< / a > < / h2 > 
 
						
						
						
							< p > For using < a  class = "reference internal"  href = "#engine-redis-server" > < span  class = "std std-ref" > Redis Server< / span > < / a >  or < a  class = "reference internal"  href = "#engine-mongodb" > < span  class = "std std-ref" > MongoDB< / span > < / a >  you need to
 
						
						
						
							install additional packages in Python’  
						
						
						
							instance.  To switch into the environment (< a  class = "reference internal"  href = "../../../admin/installation-searxng.html#searxng-src" > < span  class = "std std-ref" > Install SearXNG &  dependencies< / span > < / a > ) you can use
 
						
						
						
							< a  class = "reference internal"  href = "../../../utils/searxng.sh.html#searxng-sh" > < span  class = "std std-ref" > utils/searxng.sh< / span > < / a > :< / p > 
 
						
						
						
							< div  class = "highlight-default notranslate" > < div  class = "highlight" > < pre > < span > < / span > $ sudo utils/searxng.sh instance cmd bash
 
						
						
						
							(searxng-pyenv)$ pip install ...
 
						
						
						
							< / pre > < / div > 
 
						
						
						
							< / div > 
 
						
						
						
							< / section > 
 
						
						
						
							< section  id = "configure-the-engines" > 
 
						
						
						
							< h2 > < a  class = "toc-backref"  href = "#id7"  role = "doc-backlink" > Configure the engines< / a > < a  class = "headerlink"  href = "#configure-the-engines"  title = "Link to this heading" > ¶< / a > < / h2 > 
 
						
						
						
							< p > < a  class = "reference external"  href = "https://en.wikipedia.org/wiki/NoSQL" > NoSQL databases< / a >  are used for storing arbitrary data without first defining
 
						
						
						
							their structure.< / p > 
 
						
						
						
							< section  id = "redis-server" > 
 
						
						
						
							< span  id = "engine-redis-server" > < / span > < h3 > < a  class = "toc-backref"  href = "#id8"  role = "doc-backlink" > Redis Server< / a > < a  class = "headerlink"  href = "#redis-server"  title = "Link to this heading" > ¶< / a > < / h3 > 
 
						
						
						
							< aside  class = "sidebar" > 
 
						
						
						
							< p  class = "sidebar-title" > info< / p > 
 
						
						
						
							< ul  class = "simple" > 
 
						
						
						
							< li > < p > < code  class = "docutils literal notranslate" > < span  class = "pre" > pip< / span >  < span  class = "pre" > install< / span > < / code >  < a  class = "reference external"  href = "https://github.com/andymccurdy/redis-py#installation" > redis< / a > < / p > < / li > 
 
						
						
						
							< li > < p > < a  class = "reference external"  href = "https://redis.io/" > redis.io< / a > < / p > < / li > 
 
						
						
						
							< li > < p > < a  class = "extlink-origin reference external"  href = "https://github.com/searxng/searxng/blob/master/searx/engines/redis_server.py" > redis_server.py< / a > < / p > < / li > 
 
						
						
						
							< / ul > 
 
						
						
						
							< / aside > 
 
						
						
						
							< p  id = "module-searx.engines.redis_server" > Redis is an open source (BSD licensed), in-memory data structure (key value
 
						
						
						
							based) store.  Before configuring the < code  class = "docutils literal notranslate" > < span  class = "pre" > redis_server< / span > < / code >  engine, you must install
 
						
						
						
							the dependency < a  class = "reference external"  href = "https://github.com/andymccurdy/redis-py#installation" > redis< / a > .< / p > 
 
						
						
						
							< section  id = "configuration" > 
 
						
						
						
							< h4 > Configuration< a  class = "headerlink"  href = "#configuration"  title = "Link to this heading" > ¶< / a > < / h4 > 
 
						
						
						
							< p > Select a database to search in and set its index in the option < code  class = "docutils literal notranslate" > < span  class = "pre" > db< / span > < / code > .  You can
 
						
						
						
							either look for exact matches or use partial keywords to find what you are
 
						
						
						
							looking for by configuring < code  class = "docutils literal notranslate" > < span  class = "pre" > exact_match_only< / span > < / code > .< / p > 
 
						
						
						
							< / section > 
 
						
						
						
							< section  id = "example" > 
 
						
						
						
							< h4 > Example< a  class = "headerlink"  href = "#example"  title = "Link to this heading" > ¶< / a > < / h4 > 
 
						
						
						
							< p > Below is an example configuration:< / p > 
 
						
						
						
							< div  class = "highlight-yaml notranslate" > < div  class = "highlight" > < pre > < span > < / span > < span  class = "c1" > # Required dependency: redis< / span > 
 
						
						
						
							
 
						
						
						
							< span  class = "p p-Indicator" > -< / span > < span  class = "w" >  < / span > < span  class = "nt" > name< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "l l-Scalar l-Scalar-Plain" > myredis< / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > shortcut < / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "l l-Scalar l-Scalar-Plain" > rds< / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > engine< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "l l-Scalar l-Scalar-Plain" > redis_server< / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > exact_match_only< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "l l-Scalar l-Scalar-Plain" > false< / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > host< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "s" > ' 127.0.0.1' < / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > port< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "l l-Scalar l-Scalar-Plain" > 6379< / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > enable_http< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "l l-Scalar l-Scalar-Plain" > true< / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > password< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "s" > ' ' < / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > db< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "l l-Scalar l-Scalar-Plain" > 0< / span > 
 
						
						
						
							< / pre > < / div > 
 
						
						
						
							< / div > 
 
						
						
						
							< / section > 
 
						
						
						
							< section  id = "implementations" > 
 
						
						
						
							< h4 > Implementations< a  class = "headerlink"  href = "#implementations"  title = "Link to this heading" > ¶< / a > < / h4 > 
 
						
						
						
							< / section > 
 
						
						
						
							< / section > 
 
						
						
						
							< section  id = "engine-mongodb" > 
 
						
						
						
							< span  id = "id2" > < / span > < h3 > < a  class = "toc-backref"  href = "#id9"  role = "doc-backlink" > MongoDB< / a > < a  class = "headerlink"  href = "#engine-mongodb"  title = "Link to this heading" > ¶< / a > < / h3 > 
 
						
						
						
							< aside  class = "sidebar" > 
 
						
						
						
							< p  class = "sidebar-title" > info< / p > 
 
						
						
						
							< ul  class = "simple" > 
 
						
						
						
							< li > < p > < code  class = "docutils literal notranslate" > < span  class = "pre" > pip< / span >  < span  class = "pre" > install< / span > < / code >  < a  class = "reference external"  href = "https://github.com/mongodb/mongo-python-driver#installation" > pymongo< / a > < / p > < / li > 
 
						
						
						
							< li > < p > < a  class = "reference external"  href = "https://www.mongodb.com" > MongoDB< / a > < / p > < / li > 
 
						
						
						
							< li > < p > < a  class = "extlink-origin reference external"  href = "https://github.com/searxng/searxng/blob/master/searx/engines/mongodb.py" > mongodb.py< / a > < / p > < / li > 
 
						
						
						
							< / ul > 
 
						
						
						
							< / aside > 
 
						
						
						
							< p  id = "module-searx.engines.mongodb" > < a  class = "reference external"  href = "https://www.mongodb.com" > MongoDB< / a >  is a document based database program that handles JSON like data.
 
						
						
						
							Before configuring the < code  class = "docutils literal notranslate" > < span  class = "pre" > mongodb< / span > < / code >  engine, you must install the dependency
 
						
						
						
							< a  class = "reference external"  href = "https://github.com/mongodb/mongo-python-driver#installation" > pymongo< / a > .< / p > 
 
						
						
						
							< section  id = "id3" > 
 
						
						
						
							< h4 > Configuration< a  class = "headerlink"  href = "#id3"  title = "Link to this heading" > ¶< / a > < / h4 > 
 
						
						
						
							< p > In order to query < a  class = "reference external"  href = "https://www.mongodb.com" > MongoDB< / a > , you have to select a < code  class = "docutils literal notranslate" > < span  class = "pre" > database< / span > < / code >  and a
 
						
						
						
							< code  class = "docutils literal notranslate" > < span  class = "pre" > collection< / span > < / code > .  Furthermore, you have to select a < code  class = "docutils literal notranslate" > < span  class = "pre" > key< / span > < / code >  that is going to be
 
						
						
						
							searched.  < a  class = "reference external"  href = "https://www.mongodb.com" > MongoDB< / a >  also supports the option < code  class = "docutils literal notranslate" > < span  class = "pre" > exact_match_only< / span > < / code > , so configure
 
						
						
						
							it as you wish.< / p > 
 
						
						
						
							< / section > 
 
						
						
						
							< section  id = "id4" > 
 
						
						
						
							< h4 > Example< a  class = "headerlink"  href = "#id4"  title = "Link to this heading" > ¶< / a > < / h4 > 
 
						
						
						
							< p > Below is an example configuration for using a MongoDB collection:< / p > 
 
						
						
						
							< div  class = "highlight-yaml notranslate" > < div  class = "highlight" > < pre > < span > < / span > < span  class = "c1" > # MongoDB engine< / span > 
 
						
						
						
							< span  class = "c1" > # Required dependency: pymongo< / span > 
 
						
						
						
							
 
						
						
						
							< span  class = "p p-Indicator" > -< / span > < span  class = "w" >  < / span > < span  class = "nt" > name< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "l l-Scalar l-Scalar-Plain" > mymongo< / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > engine< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "l l-Scalar l-Scalar-Plain" > mongodb< / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > shortcut< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "l l-Scalar l-Scalar-Plain" > md< / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > exact_match_only< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "l l-Scalar l-Scalar-Plain" > false< / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > host< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "s" > ' 127.0.0.1' < / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > port< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "l l-Scalar l-Scalar-Plain" > 27017< / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > enable_http< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "l l-Scalar l-Scalar-Plain" > true< / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > results_per_page< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "l l-Scalar l-Scalar-Plain" > 20< / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > database< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "s" > ' business' < / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > collection< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "s" > ' reviews' < / span > < span  class = "w" >   < / span > < span  class = "c1" > # name of the db collection< / span > 
 
						
						
						
							< span  class = "w" >   < / span > < span  class = "nt" > key< / span > < span  class = "p" > :< / span > < span  class = "w" >  < / span > < span  class = "s" > ' name' < / span > < span  class = "w" >             < / span > < span  class = "c1" > # key in the collection to search for< / span > 
 
						
						
						
							< / pre > < / div > 
 
						
						
						
							< / div > 
 
						
						
						
							< / section > 
 
						
						
						
							< section  id = "id5" > 
 
						
						
						
							< h4 > Implementations< a  class = "headerlink"  href = "#id5"  title = "Link to this heading" > ¶< / a > < / h4 > 
 
						
						
						
							< / section > 
 
						
						
						
							< / section > 
 
						
						
						
							< / section > 
 
						
						
						
							< / section > 
 
						
						
						
							
 
						
						
						
							
 
						
						
						
							            < div  class = "clearer" > < / div > 
 
						
						
						
							          < / div > 
 
						
						
						
							        < / div > 
 
						
						
						
							      < / div > 
 
						
						
						
							  < span  id = "sidebar-top" > < / span > 
 
						
						
						
							      < div  class = "sphinxsidebar"  role = "navigation"  aria-label = "Main" > 
 
						
						
						
							        < div  class = "sphinxsidebarwrapper" > 
 
						
						
						
							  
 
						
						
						
							    
 
						
						
						
							            < p  class = "logo" > < a  href = "../../../index.html" > 
 
						
						
						
							              < img  class = "logo"  src = "../../../_static/searxng-wordmark.svg"  alt = "Logo of SearXNG" / > 
 
						
						
						
							            < / a > < / p > 
 
						
						
						
							  
 
						
						
						
							
 
						
						
						
							< h3 > < a  href = "../../../index.html" > Table of Contents< / a > < / h3 > 
 
						
						
						
							< ul  class = "current" > 
 
						
						
						
							< li  class = "toctree-l1" > < a  class = "reference internal"  href = "../../../user/index.html" > User information< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l1" > < a  class = "reference internal"  href = "../../../own-instance.html" > Why use a private instance?< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l1" > < a  class = "reference internal"  href = "../../../admin/index.html" > Administrator documentation< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l1 current" > < a  class = "reference internal"  href = "../../index.html" > Developer documentation< / a > < ul  class = "current" > 
 
						
						
						
							< li  class = "toctree-l2" > < a  class = "reference internal"  href = "../../quickstart.html" > Development Quickstart< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l2" > < a  class = "reference internal"  href = "../../rtm_asdf.html" > Runtime Management< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l2" > < a  class = "reference internal"  href = "../../contribution_guide.html" > How to contribute< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l2" > < a  class = "reference internal"  href = "../../extended_types.html" > Extended Types< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l2 current" > < a  class = "reference internal"  href = "../index.html" > Engine Implementations< / a > < ul  class = "current" > 
 
						
						
						
							< li  class = "toctree-l3" > < a  class = "reference internal"  href = "../enginelib.html" > Engine Library< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l3" > < a  class = "reference internal"  href = "../engines.html" > SearXNG’ < / a > < / li > 
 
						
						
						
							< li  class = "toctree-l3" > < a  class = "reference internal"  href = "../engine_overview.html" > Engine Overview< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l3" > < a  class = "reference internal"  href = "../index.html#resultlist-and-engines" > ResultList and engines< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l3 current" > < a  class = "reference internal"  href = "../index.html#engine-types" > Engine Types< / a > < ul  class = "current" > 
 
						
						
						
							< li  class = "toctree-l4" > < a  class = "reference internal"  href = "../index.html#online-engines" > Online Engines< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l4 current" > < a  class = "reference internal"  href = "../index.html#offline-engines" > Offline Engines< / a > < ul  class = "current" > 
 
						
						
						
							< li  class = "toctree-l5" > < a  class = "reference internal"  href = "../offline_concept.html" > Offline Concept< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l5" > < a  class = "reference internal"  href = "../demo/demo_offline.html" > Demo Offline Engine< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l5" > < a  class = "reference internal"  href = "command-line-engines.html" > Command Line Engines< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l5 current" > < a  class = "current reference internal"  href = "#" > NoSQL databases< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l5" > < a  class = "reference internal"  href = "search-indexer-engines.html" > Local Search APIs< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l5" > < a  class = "reference internal"  href = "sql-engines.html" > SQL Engines< / a > < / li > 
 
						
						
						
							< / ul > 
 
						
						
						
							< / li > 
 
						
						
						
							< li  class = "toctree-l4" > < a  class = "reference internal"  href = "../index.html#online-url-search" > Online URL Search< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l4" > < a  class = "reference internal"  href = "../index.html#online-currency" > Online Currency< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l4" > < a  class = "reference internal"  href = "../index.html#online-dictionary" > Online Dictionary< / a > < / li > 
 
						
						
						
							< / ul > 
 
						
						
						
							< / li > 
 
						
						
						
							< / ul > 
 
						
						
						
							< / li > 
 
						
						
						
							< li  class = "toctree-l2" > < a  class = "reference internal"  href = "../../result_types/index.html" > Result Types< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l2" > < a  class = "reference internal"  href = "../../templates.html" > Simple Theme Templates< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l2" > < a  class = "reference internal"  href = "../../search_api.html" > Search API< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l2" > < a  class = "reference internal"  href = "../../plugins/index.html" > Plugins< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l2" > < a  class = "reference internal"  href = "../../answerers/index.html" > Answerers< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l2" > < a  class = "reference internal"  href = "../../translation.html" > Translation< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l2" > < a  class = "reference internal"  href = "../../lxcdev.html" > Developing in Linux Containers< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l2" > < a  class = "reference internal"  href = "../../makefile.html" > Makefile &  < code  class = "docutils literal notranslate" > < span  class = "pre" > ./manage< / span > < / code > < / a > < / li > 
 
						
						
						
							< li  class = "toctree-l2" > < a  class = "reference internal"  href = "../../reST.html" > reST primer< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l2" > < a  class = "reference internal"  href = "../../searxng_extra/index.html" > Tooling box < code  class = "docutils literal notranslate" > < span  class = "pre" > searxng_extra< / span > < / code > < / a > < / li > 
 
						
						
						
							< / ul > 
 
						
						
						
							< / li > 
 
						
						
						
							< li  class = "toctree-l1" > < a  class = "reference internal"  href = "../../../utils/index.html" > DevOps tooling box< / a > < / li > 
 
						
						
						
							< li  class = "toctree-l1" > < a  class = "reference internal"  href = "../../../src/index.html" > Source-Code< / a > < / li > 
 
						
						
						
							< / ul > 
 
						
						
						
							
 
						
						
						
							  < h3 > Project Links< / h3 > 
 
						
						
						
							  < ul > 
 
						
						
						
							    < li > < a  href = "https://github.com/searxng/searxng/tree/master" > Source< / a > 
 
						
						
						
							  
 
						
						
						
							    < li > < a  href = "https://github.com/searxng/searxng/wiki" > Wiki< / a > 
 
						
						
						
							  
 
						
						
						
							    < li > < a  href = "https://searx.space" > Public instances< / a > 
 
						
						
						
							  
 
						
						
						
							    < li > < a  href = "https://github.com/searxng/searxng/issues" > Issue Tracker< / a > 
 
						
						
						
							  < / ul > < h3 > Navigation< / h3 > 
 
						
						
						
							< ul > 
 
						
						
						
							  < li > < a  href = "../../../index.html" > Overview< / a > 
 
						
						
						
							    < ul > 
 
						
						
						
							      < li > < a  href = "../../index.html" > Developer documentation< / a > 
 
						
						
						
							        < ul > 
 
						
						
						
							      < li > < a  href = "../index.html" > Engine Implementations< / a > 
 
						
						
						
							        < ul > 
 
						
						
						
							          < li > Previous: < a  href = "command-line-engines.html"  title = "previous chapter" > Command Line Engines< / a > 
 
						
						
						
							          < li > Next: < a  href = "search-indexer-engines.html"  title = "next chapter" > Local Search APIs< / a > < / ul > 
 
						
						
						
							      < / li > < / ul > 
 
						
						
						
							      < / li > 
 
						
						
						
							    < / ul > 
 
						
						
						
							  < / li > 
 
						
						
						
							< / ul > 
 
						
						
						
							< search  id = "searchbox"  style = "display: none"  role = "search" > 
 
						
						
						
							  < h3  id = "searchlabel" > Quick search< / h3 > 
 
						
						
						
							    < div  class = "searchformwrapper" > 
 
						
						
						
							    < form  class = "search"  action = "../../../search.html"  method = "get" > 
 
						
						
						
							      < input  type = "text"  name = "q"  aria-labelledby = "searchlabel"  autocomplete = "off"  autocorrect = "off"  autocapitalize = "off"  spellcheck = "false" / > 
 
						
						
						
							      < input  type = "submit"  value = "Go"  / > 
 
						
						
						
							    < / form > 
 
						
						
						
							    < / div > 
 
						
						
						
							< / search > 
 
						
						
						
							< script > document . getElementById ( 'searchbox' ) . style . display  =  "block" < / script > 
 
						
						
						
							  < div  role = "note"  aria-label = "source link" > 
 
						
						
						
							    < h3 > This Page< / h3 > 
 
						
						
						
							    < ul  class = "this-page-menu" > 
 
						
						
						
							      < li > < a  href = "../../../_sources/dev/engines/offline/nosql-engines.rst.txt" 
 
						
						
						
							            rel = "nofollow" > Show Source< / a > < / li > 
 
						
						
						
							    < / ul > 
 
						
						
						
							   < / div > 
 
						
						
						
							        < / div > 
 
						
						
						
							      < / div > 
 
						
						
						
							      < div  class = "clearer" > < / div > 
 
						
						
						
							    < / div > 
 
						
						
						
							    < div  class = "footer"  role = "contentinfo" > 
 
						
						
						
							    ©  Copyright SearXNG team.
 
						
						
						
							    < / div > 
 
						
						
						
							  < / body > 
 
						
						
						
							< / html >