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Crawl more file types by installing IFilters (Search Server 2008)

Applies To: Microsoft Search Server 2008

 

Topic Last Modified: 2009-03-11

Note

Unless otherwise noted, the information in this article applies to both Microsoft Search Server 2008 and Microsoft Search Server 2008 Express.

Content is only crawled if the relevant file name extension is included in the file-type inclusions list and an IFilter is installed on the index server that supports those file types. Several file types are included automatically during initial installation. When you plan for content sources in your initial deployment, determine whether content you want to crawl uses file types that are not included. If file types are not included, you must add those file types on the Manage File Types page during deployment and ensure that an IFilter is installed and registered to support that file type.

Search Server 2008 provides several IFilters, and more are available from Microsoft and third-party vendors. If necessary, software developers can create IFilters for new file types. For more information about how to install and register additional IFilters that are available from Microsoft, see How to register Microsoft Filter Pack with SharePoint Server 2007 and with Search Server 2008 (https://go.microsoft.com/fwlink/?LinkId=110532).

On the other hand, if you want to exclude certain file types from being crawled, you can delete the file name extension for that file type from the file type inclusions list. Doing so excludes file names that have that extension from being crawled.

The following table lists which file types are supported by the IFilters that are installed by default and which file types are enabled on the Manage File Types page by default.

File name extension Default IFilter support Default file type inclusions

ascx

Yes

Yes

asm

Yes

No

asp

Yes

Yes

aspx

Yes

Yes

bat

Yes

No

c

Yes

No

cmd

Yes

No

cpp

Yes

No

css

Yes

No

cxx

Yes

No

def

Yes

No

dic

Yes

No

doc

Yes

Yes

docm

Yes

Yes

docx

Yes

Yes

dot

Yes

Yes

eml

Yes

Yes

exch

No

Yes

h

Yes

No

hhc

Yes

No

hht

Yes

No

hpp

Yes

No

hta

Yes

No

htm

Yes

Yes

html

Yes

Yes

htw

Yes

No

htx

Yes

No

jhtml

No

Yes

jsp

No

Yes

lnk

Yes

No

mht

Yes

Yes

mhtml

Yes

Yes

mpx

Yes

No

msg

Yes

Yes

mspx

No

Yes

nsf

No

Yes

odc

Yes

Yes

one

No

No

php

No

Yes

pot

Yes

No

pps

Yes

No

ppt

Yes

Yes

pptm

Yes

Yes

pptx

Yes

Yes

pub

Yes

Yes

stm

Yes

No

tif

Yes

Yes

tiff

No

Yes

trf

Yes

No

txt

Yes

Yes

url

No

Yes

vdx

No

Yes

vsd

No

Yes

vss

No

Yes

vst

No

Yes

vsx

No

Yes

vtx

No

Yes

xlb

Yes

No

xlc

Yes

No

xls

Yes

Yes

xlsm

Yes

Yes

xlsx

Yes

Yes

xlt

Yes

No

xml

Yes

Yes

IFilters and Microsoft Office OneNote

An IFilter is not provided for the .one file name extension used by Microsoft Office OneNote. If you want users to be able to search content in Office OneNote files, you must install an IFilter for OneNote. To do this, you must do one of the following.