The documentation on this page corresponds to rev 200 (April 2016) of the tools suite. See Older Versions for documentation on earlier releases of this suite.
The ODK 2.0 tools are in various stages of Alpha and Beta release.
- Alpha software does not have all features, and is more likely to have significant reductions or additions of functionality. Alpha releases are provided to gather user feedback on the usability and capabilities of the application, as well as bug reports (to make the application more robust). Updates may result in loss of data or incompatible changes in form designs.
- Beta software does not have all features, but is less likely to have significant reductions or alterations in functionality. Beta releases are provided to gather user feedback on the usability and capabilities of the application, as well as bug reports (to make the application more robust). Updates may result in loss of data or incompatible changes in form designs.
- Alpha and Beta releases can be used at their current set of capabilities, but the ODK core team cannot provide support for deployments using them or guarantee a migration path into future releases. If you use these, you should plan to use them as-is, without expecting upgrades to newer versions of the tools. The ODK 2.0 tools have mechanisms to extract your data as CSV files from these tools, and to re-import data via CSV files. This provides a migration path to newer releases, but will generally require manual actions on your part.
- Release Candidate software does not have support for deployments, but the ODK core team does guarantee a migration path (possibly with many tedious manual steps) into future releases.
- Production software has been used in several deployments and there is some level of confidence that the software is stable. As with any software, there is no guarantee of being bug-free.
Non-technical users may find the usage descriptions difficult to follow and there may be a considerable number of manual steps needed to utilize the tools. As we progress from Alpha to Beta to Release Candidate and Production versions of the tools, they should become easier to use.
The next-generation ODK tools (the ODK 2.0 Tools Suite) are intended to address several limitations of the existing ODK Collect / ODK Aggregate / ODK Briefcase data collection workflow. These are:
- More flexible, user-directed, navigation of a survey. The 2.0 tools do not impose a strict sequential advancement through a form like ODK Collect; form designers can allow users to traverse a form in any order, yet impose validation of collected data prior to traversing into subsequent steps in a workflow.
- Improved treatment of repeat-groups. In the 2.0 tools, we have eliminated the concept of a repeat-group. In its place, we provide prompts that enable you to open and edit other surveys with links back to the originating survey (if desired). These prompts can describe a sub-form (nested) relationship among the surveys (e.g., household and household-member) or they can represent arbitrary relational linkages across your data (e.g., tea-houses and tea-types).
- Bi-directional synchronization of data across devices. The ODK 2.0 tools support the collaborative sharing of survey data across devices, and the updating and submission of changes to previously-collected data (i.e., follow-up surveys) via a bi-directional synchronization protocol; this contrasts with the uni-directional device-to-server submission pathway of ODK Collect / ODK Aggregate / ODK Briefcase.
- Data curation and visualization on the device. ODK Tables gives organizations the ability to investigate and visualize entire datasets directly on the Android devices through graphical and non-graphical displays and through filtered views.
- Eliminate the need to fork the underlying Java codebase. The ODK 2.0 tools include an Application Packager that will eliminate the need for an organization to fork and maintain their own versions of the ODK Survey or ODK Tables applications in order to create their own branded and controlled app.
The 2.0 Tools Suite consists of:
- ODK Application Designer 2.0 rev 200- a design environment for creating, customizing and previewing your forms and data curation and visualization applications.
- ODK Tables v2.0 rev 200 - a data curation and visualization application running on your device.
- ODK Services v2.0 rev 200 - handles database access, file access, and data synchronization services between all the ODK 2.0 applications. It also allows you to synchronize data collected by the ODK 2.0 tools using the 2.0 protocol with an ODK Aggregate instance.
- ODK Aggregate Tables Extensions v2.0 rev 200 - enhancements to support bi-directional data synchronization across disconnected devices.
Trying It Out
First, see the ODK Survey and ODK Tables pages. They cover setting up these tools (and ODK Services) and downloading and exploring demonstration forms and applications built upon these tools. These demonstration applications will give you a good sense of the flexibility and breadth of capabilities of the two tools.
Next, see the Getting Started Guide to understand the process for revising and developing your own forms. That guide will walk you through modifying the Geotagger demo app to add an additional field to it.
If you wish to contribute documentation or tutorials for the new tools, a Google doc has been started to hold user-contributed documentation here.
If you feel a section in that document is stable enough and complete enough to move onto the opendatakit.org site, please contact us to coordinate the move.
Limitations and Expected Changes¶
There are currently known issues with database tables that grow over 1MB in size. They cannot by synced to your Aggregate server and may not render correctly. Syncing may also fail if your Aggregate server does not allow anonymous access. Auto-detection of non-default application names may not occur correctly. The workaround is to create a widget on the device's homescreen to launch directly into the desired application.
Descriptions of older versions of the tools may be found here