Hi,

I'm trying to setup a link that includes multiple custom tracks.  To do this I 
create a file containing the browser and track lines and link to that.  This 
part works one track is in a bigBed format and it displays correctly.  The next 
track is in a gtf or bed format and it does not.    I can't figure out a track 
line to use a gtf or bed file.  The examples in the user guide for these file 
types only seem to work if you create a link with one custom annotation file in 
the .bed or .gtf formats.  I've tried a number of annotation names to try and 
get it to read a .bed or gtf file.  I'm not sure if this is possible.  It would 
help me narrow down the problem if anyone could tell me what the correct track 
line is to include a .bed or .gtf file if this is even possible.  Since it 
isn't a format that works with the bigDataUrl attribute.

A simple solution that I've tried is converting to bigBed, but I keep running 
into problems trying to convert the bed file to a bigBed file so maybe the 
problem is in the file and not in trying to include a gtf or bed file this way, 
but I can upload the file directly and it works correctly or I can use the 
example(below) from the users guide with both the gtf or bed file.

http://genome.ucsc.edu/cgi-bin/hgTracks?org=rat&position=chr19&;
hgt.customText=http://server/ucsc/transcripts.allSamples.3s.bed



A general example of the annotation file follows:

browser hide all
browser full ensGene knownGene refGene
track db=rn4 type=bigBed name="AffyRatProbesets" description="Affy Rat Exon 
Probesets: Red=Core Green=Full Blue=Extended" visibility=3 itemRgb=On 
bigDataUrl=http://username:password@server/ucsc/ratBigBed.bb
track db=rn4 name="RNA Assembled Isoforms" description="Isoforms Constructed 
From RNA Seq" visibility=2 
bigDataUrl=http://username:password@server/ucsc/transcripts.allSamples.3s.bed

Obviously the files for the second track aren't appropriate for bigDataUrl, but 
I can't seem to find any documentation about what the attribute name should be 
for a bed or gtf file or if something like this is possible as it seems for 
this to work the files should be in a bigBed or other documented format.

Any suggestions would be greatly appreciated.

Thank you,
Spencer Mahaffey
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