## Include external content
Optimizely Search & Navigation supports these predefined search connector types to include external content: Crawler and RSS/Atom.
Content indexed with connectors uses `EPiServer.Find.Framework.WebContent
`.
## Exclude media types
You can fine-tune indexing by excluding internet media types, and excluding or including parts of a website to be crawled and indexed from the Optimizely Search & Navigation administrative interface. See [Add connectors](🔗) in the Optimizely User Guide.
When excluding media types, follow the standard method of classifying internet file types. See also: [Media Types](🔗). The following media types are excluded by default when indexing:
text/css
text/javascript
text/ecmascript
application/x-pointplus
application/x-javascript
application/javascript
application/ecmascript
## Exclude query strings
You can exclude any query string. As a use case, exclude known tracking URL parameters. For example, in the URL _[http://www.episerver.se/cms/innehallshantering?utm\_source=google](🔗)_, you can exclude _utm\_source_ to prevent the unintentional incrementing of a campaign counter.
Common exclusions of this type:
PHPSESSID
SESSIONID
JSESSIONID
ASPSESSIONID
sid
zenid
Note
All strings are case-sensitive. Include no wildcards nor whitespaces.
## Patterns and globbing
_Globbing_ lets you expand a non-specific file name containing a wildcard character into a set of specific file names for storage on a computer, server, or network. All excluded fields support common glob patterns. The crawler connector uses patterns similar to those in _robots.txt_.
**Pattern** | **Example** | **Corresponding regex** | Column Title | Column Title |
'\*' | \*/abc/ <br>/root/ | .\*/abc/.\* <br>.\*://.\*/root/.\* |  |  |
'?' | \*/???/ | .\*/.../.\* |  |  |
'{', '}', ',' | {abc,def} | .\*(abc | def).\* |  |
'[', ']', '!', ',' | [0-9,xyz][!abc] | .\*[0-9xyz][^abc].\* |  |  |
',' | abc,def | .\*abc,def.\* |  |  |
'\' | \\\*\?\,\{\}\[\]\\ | .\*\\\*\?\,\{\}\[\]\\.\* |  |  |
'.', '(', ')', '+', ' | ', '^', '$', '@', '%'Â | .()+ | ^$@% | .\*\.\+|\^\$\@\%.\* |
## Include patterns
Parameter name `included\_crawl\_patterns
`. Can be a single globbing pattern as string or an array of globbing patterns.
Default: Seed base URLs.
## Exclude patterns
Parameter name `excluded\_crawl\_patterns
`. Can be a single globbing pattern as a string or an array of globbing patterns. Overrides include patterns.
Default: '.{avi,bmp,css,gif,gz,ico,jpeg,jpg,js,m4v,mid,mov,mp2,mp3,mp4,mpeg,png,ram,rar,rm,smil,swf,tif,tiff,wav,wma,wmv,zip}'
## No index patterns
Parameter name `excluded\_index\_patterns
` can be a single globbing pattern as a string or an array of globbing patterns.