Gel_DASgenexp_BOSC2009

DASGenExp: an interactive web-based DAS client with client-side rendering - BOSC 09 - Bernat Gel (bgel@lsi.upc.edu)

DASGenExp:an interactive web-based DAS client with client-side rendering

Bernat Gel and Xavier Messeguer

Universitat Politècnica de Catalunya, UPC

bgel@lsi.upc.edu

DASGenExp Is a web-based interactive genomic DAS

browser

It has direct interaction capabilities

Follows the “smart client – dumb server” philosophy from DAS

In contrast to many other web-based browsers, it uses client-side drawing to represent the genomic data

Client-side Rendering All the data is processed and rendeed on

the client machine (using javascript and HTML5 canvas)

Increased control over the drawing process

Removes load from servers

Increases cacheability

Reduces response times to user commands

Implementation• Client written in javascript

– Prototype Javascript Library

– EXT GUI toolkit

– JSDAS

• Small server written in perl (using Bio::Das::Lite)

– Caching

– SOP

Implementation

DASGenExpServer

DAS Source

HTTP + XML

Client

ClientCache

AJAX + JSON

Overview

Main Toolbar

ViewerTrack Container

Overview

Select an Organism

Overview

Select an Entry Point

Overview

Select Tracks

Overview

Data appearsExtended info can be obtained for each feature

Multiple Views: Zoom

Multiple Views: Positions

Customization

DAS Sources

Sessions

Future Work Make DASGenExp a real DAS browser

Fully compliant with DAS stylesheets

Integration with the registry

Speed-up the server side

Data filters and exportation

Test the DAS writeback

Thanks

Gel_DASgenexp_BOSC2009

das sources jsdas

overview data

data filters

genomic data

multiple views

webbased browsers

dasstylesheets integration

drawing process

Technology