Gepsio for Universal Windows Underway

The following email came in to the Gepsio inbox today:


I am very interested in trying out Gepsio on the windows 10 universal app platform.

I saw that a universal windows project has been added to the repo without some vital xml parts.

Will there be a new patch soon with the remaining parts?

As a matter of fact, yes! That work is underway now.

The email is referencing this changeset, which contains the following somewhat-cryptic description:

Universal Windows project added. XML implementation for Universal Windows is not implemented, and there are no unit tests for Universal Windows, so Gepsio for Universal Windows cannot be used at this time. The .NET builds are, as always, fully supported.

That changeset included a new project in the Gepsio solution – a project which would target a Gepsio assembly tuned for the Windows 10 Universal Windows Platform (or UWP, for short). The vision is to allow Gepsio to be used by developers wishing to build XBRL-enabled applications on Windows 10 UWP.

Thanks to the interface-based separation between Gepsio’s XML service layer and its XBRL semantic layer, described here, the work needed to allow Gepsio to support Windows 10 UWP is not a “do over”. The work involved is, basically, to build new XML interface implementations that use Windows 10 UWP instead of .NET. This work is underway now. In fact, Gepsio already has enough UWP code to open up an XML document and search for <xbrl> nodes in Windows 10. This is exciting, as it means that Gepsio can be used for code that runs on any Windows 10 UWP platform, from the phone, to the tablet, to the desktop, to the Xbox One.

The Windows 10 UWP code is not ready, and, although the project skeleton has been checked in, the XML layer for Windows 10 UWP is not ready. That code is in progress. When it’s ready, there will be a blog post announcing the new code. The code is not a straightforward port from the .NET XML code, for the following reasons:

  • The .NET code uses the XML classes in the System.Xml namespace. The Windows 10 UWP code is using XML classes in the Windows.Data.Xml.Dom namespace.
  • The Windows 10 UWP makes use of asynchronous methods; for example, XmlDocument.Load() has become await XmlDocument.LoadFromFileAsync(). Ensuring that Gepsio supports this asynchronous model, while still maintaining the existing needs of the Gepsio XBRL semantic layer, will need some additional work.
  • Unlike .NET’s System.Xml namespace, the Windows 10 UWP’s Windows.Data.Xml.Dom namespace does not have any built in support for XML Schema. XBRL relies on XML Schema documents for its taxonomies. Gepsio’s XML Schema¬†support will have to be written from the ground up since there is no support for XML Schema in UWP.

Gepsio will retain its .NET builds as well. Gepsio will continue to support .NET 3.5, .NET 4, .NET 4.5, .NET 4.5.1, .NET 4.5.2, and .NET 4.6. If you’re not ready to move to Windows 10 UWP just yet, do not worry – all of the .NET builds will continue to be supported and ship for the foreseeable future.

Assemblies for Multiple Platforms Available with Next Release

The Gepsio code base has just undergone a significant restructuring with changeset 77191. As a benefit of the restructuring, the project will, for the first time, be able to provide assemblies for the following platforms:

  • .NET 3.5
  • .NET 4
  • .NET 4.5
  • .NET 4.5.1
  • .NET 4.5.2
  • .NET 4.6

This restructuring also puts Gepsio in the position to provide support for .NET platforms, including the Universal Windows Platform (UWP) available with Windows 10. This is an exciting time for the project, as, up to this point, Gepsio has provided assemblies only for the aging .NET 3.5 platform.

The restructuring relies heavily on the Shared Projects concept available in Visual Studio 2015 to provide support for sharing common code across each of the platform builds. As such, Visual Studio 2015 is now required to open the solution’s source code.

For those users interested only in compiled binaries, no change is needed. Both the project site on Codeplex and Gepsio’s NuGet package will be updated with all of the platform binaries produced by the build process.