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A bugfix for VisTrails 2.0 alpha has just been released and it is available on the Downloads page.
The VisTrails 2.0 alpha has been released and it is available for download from http://www.vistrails.org/index.php/Downloads. VisTrails is now distributed under the BSD license and its GUI was completely re-designed to make it easier to manage and interact with multiple workflows. It also includes a much improved Users' Manual. Some notable features include:
- the ability to create mashups;
- support for the creation of reproducible papers;
- a provenance viewer;
- support for visual diffs as well as queries over workflows in different vistrails;
- a Control Flow Assistant to simplify the creation of workflows with loops and conditional constructs;
- support for global variables, so that modules deriving from Constant can be used to create variables that are shared among multiple workflows.

See the release notes for the complete list of changes.

For a while, we have been accepting patches from our developer community. We are in the process of making patch submission easier and will provide detailed instructions shortly.

Check out the new VisTrails vtDV3D package. vtDV3D was developed by Thomas Maxwell (NASA). It supports advanced (VTK-based) visualization and (CDAT-based) analysis of climate data. Documentation is available at http://portal.nccs.nasa.gov/DV3D.

We now have a paper that describes the guts of VisTrails in The Architecture of Open Source Applications.

VisTrails 1.6.2 just released! This is mainly a bug-fix release. You can download this new version on the Downloads page.

A Web version of the Users Guide is currently under development and can be accessed at http://www.vistrails.org/usersguide.

The VisTrails methodology and infrastructure for creating provenance-rich, executable publications has been selected as a finalist of the Executable Paper Grand Challenge. We will present this work at the ICCS Meeting, in Tsukuba, Japan.

The Opal plugin for VisTrails has been released. For more information see the NBCR Public Wiki: https://www.nbcr.net/pub/wiki/index.php?title=VisTrails

ALPS 2.0 has been released and is now fully integrated with VisTrails. For details see the ALPS Web page.

A description of the ALPS 2.0 system is now available at http://arxiv.org/abs/1101.2646. This is an example of an executable paper, whose results can be reproduced and verified. Check out this video which shows how we create and modify executable papers using VisTrails: http://www.vistrails.org/images/executable_paper_latex.mov

LifeMapper clients for VisTrails have been released. See http://biodiversity.ku.edu/blog/lab-notes/lifemapper-vistrails-better-science for details.

VisTrails 1.6.1 just released! This is mainly a bug-fix release.

VisTrails 1.6 released! Now featuring a new Web Services package (based on the SUDS library) and the ability to save parameter explorations among other features. For a complete list of features and bug fixes, see the release notes. You can download this new version on the Downloads page.

A paper describing the use of VisTrails to teach scientific visualization has received a best paper award at the Eurographics 2010 conference.

David Koop gave a talk about VisTrails at PyCon 2010: For more details and a video of his lecture see http://us.pycon.org/2010/conference/schedule/event/13/

ParaView 3.6.2 includes the VisTrails Provenance Explorer plugin. See the Kitware announcement and Kitware Source, Jan 2010.

VisTrails was featured at Supercomputing 2009

Help us improve VisTrails! Fill out the VisTrails User Survey at http://www.surveymonkey.com/s.aspx?sm=mLJIXDfPA5CBEXYjYSUuKg_3d_3d
After submitting the survey, you will be invited to sign up for a prize draw: we are giving away 5 Amazon gift certificates worth USD 25 each to people that file their survey by August 8th, 2009.

VisTrails 1.3 available for download. Besides bug fixes, version 1.3 includes many new features

VisTrails 1.2.2 available for download. Version 1.2.2 is a stable version and includes several bug fixes.

VisTrails was featured as a National Science Foundation Discovery

VisTrails Overview

VisTrails is an open-source scientific workflow and provenance management system that provides support for simulations, data exploration and visualization. Whereas workflows have been traditionally used to automate repetitive tasks, for applications that are exploratory in nature, such as simulations, data analysis and visualization, very little is repeated---change is the norm. As an engineer or scientist generates and evaluates hypotheses about data under study, a series of different, albeit related, workflows are created while a workflow is adjusted in an interactive process. VisTrails was designed to manage these rapidly-evolving workflows.

A key distinguishing feature of VisTrails is a comprehensive provenance infrastructure that maintains detailed history information about the steps followed and data derived in the course of an exploratory task: VisTrails maintains provenance of data products, of the workflows that derive these products and their executions. This information is persisted as XML files or in a relational database, and it allows users to navigate workflow versions in an intuitive way, to undo changes but not lose any results, to visually compare different workflows and their results, and to examine the actions that led to a result. It also enables a series operations and user interfaces that simplify workflow design and use, including the ability to create and refine workflows by analogy and to query workflows by example.

VisTrails supports the creation and execution of workflows. It allows the combination of loosely-coupled resources, specialized libraries, grid and Web services. The released version comes with support for several packages including, VTK, Image Magick, Web Services, and pylab. You can also download packages contributed by our users, as well as create your own packages/modules. Workflows can be run interactively, through the VisTrails GUI, or in batch using a VisTrails server.

VisTrails 1.0 was released in October 2007. Since then, the system has been downloaded thousands of times. VisTrails is written in Python and it uses the multi-platform Qt library for its user interface. It runs on Mac, Linux and Windows. You can download VisTrails from http://www.vistrails.org/index.php/Downloads

Building Workflows with VisTrails

VisTrails supports workflows expressed as dataflows. It can also support functional loops and conditional statements (new in VisTrails 1.3!). In addition, VisTrails is easily extensible; users can quickly create new modules or wrap existing code or libraries for use as modules in VisTrails. Also, the PythonSource module can be used to write one-time translations or test code in a workflow. See the Users' Guide for more details on all of these features.

Combining VisTrails Provenance with other Tools

The VisTrails provenance infrastructure can also be combined with interactive tools. We are developing a series of provenance plugins for different tools, including VisIt and ParaView. The open-source ParaView plugin has been released.

Visualizing and Comparing Workflow Results

VisTrails provides a spreadsheet where users can compare the results of multiple workflows, or multiple workflow runs. Besides using a desktop, you can display the results of VisTrails workflows on a display wall or on an iPod. Users can also compare different workflows using the visual difference interface.

Querying and Refining Workflows by Example

Users can quickly construct expressive queries over a collection of workflows by example, using the same familiar interface they use to build workflows. VisTrails also provides an analogy mechanism whereby users can perform complex modifications to workflows by analogy, without having to directly modify the workflow specifications.

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User's Guide

A Web version of the Users Guide is currently under development and can be accessed at http://www.vistrails.org/usersguide.

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Some Projects using VisTrails

NASA Climate Data Analysis	DOE CDAT

NSF STC CMOP	NSF CDI Wildfire	NSF DataONE-EVA

See other projects

Vistrails and Teaching

The VisTrails system has been used a tool to teach different courses, including Scientific Visualization and Digital Media. For more information on the educational uses of VisTrails see VisTrails and Teaching. Our paper describing a provenance-rich teaching methodology received the Best Paper Award at the Eurographics 2010 Education program.