From BioDAS
/das/mysource/features?segment=X:1,750
<FEATURE id="transcriptA">
<START>100</START>
<END> 600</END>
<PART id="exon1" />
<PART id="exon2" />
<PART id="exon3" />
</FEATURE>
<FEATURE id="transcriptA">
<START>300</START>
<END> 1000</END>
<PART id="exon2" />
<PART id="exon4" />
</FEATURE>
<FEATURE id="exon1">
<START>100</START>
<END> 200</END>
<PARENT id="transcriptA" />
</FEATURE>
<FEATURE id="exon2">
<START>300</START>
<END> 400</END>
<PARENT id="transcriptA" />
<PARENT id="transcriptB" />
</FEATURE>
<FEATURE id="exon3">
<START>500</START>
<END> 600</END>
<PARENT id="transcriptA" />
</FEATURE>
<FEATURE id="exon4">
<START>700</START>
<END> 800</END>
<PARENT id="transcriptB" />
</FEATURE>
1 750 1000
+--------------------------------+
transcriptA | ----- ----- ----- |
| exon1 exon2 exon3 |
transcriptB | ----- --|-- -----
| exon2 exon4 exon5