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.
Install the Microsoft Office OneNote 2007 client application on the index server.
The IFilter provided by Office OneNote 2007 can be used to crawl both Office OneNote 2003 and Office OneNote 2007 files. The IFilter installed by Office OneNote 2003 can crawl Office OneNote 2003 files only.
Install and register the Microsoft Filter Pack.
The OneNote IFilter provided by this filter pack can be used to crawl Office OneNote 2007 files only. For more information, see How to register Microsoft Filter Pack with SharePoint Server 2007 and with Search Server 2008 (https://go.microsoft.com/fwlink/?LinkId=110532).