Blackbird was the codename for an online content authoring platform developed by Microsoft in the mid-90s based on the concept of distributed OLE (Object Linking and Embedding) and meant as an alternative to HTML. With scripting capability for HTML yet to be demonstrated, it was to be a means to serve dynamic, media-rich applications and documents that contained processing logic, similar to what a user would experience in a desktop environment. Pages in a "Blackbird application" would be able to contain video, audio, graphs, and other OLE based document formats without the need of plug-ins.
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The technology had already been demonstrated in Microsoft's dial-up service at the time, MSN, and plans were in progress to port it to Internet use over a dedicated protocol, but work on the platform was cancelled due to performance problems. Microsoft refocused its efforts on web development around ASP and ActiveX, and the designer was refashioned into Visual InterDev.
The codename was derived from a Cold War era stealth spy plane, the Lockheed SR-71 Blackbird.
Core technology
The centerpiece of Blackbird was OLE, the container format already in use in Windows applications to allow objects and documents to communicate with each other and share information. Blackbird documents would be stored in what was called Blackbird Data Format (BDF), a structured format based on OLE storage. An SGML-based markup language, Blackbird Markup Language (BML), was also created to help automate the creation of documents, though documents based on markup would be processed into the native data format to be used as OLE objects, so would suffer performance disadvantages. To give developers more flexibility, Microsoft planned to include a utility that would allow conversion between BDF and BML, as well as HTML, in any direction.
Additionally, there would be an application resource installer that packaged custom fonts, OLE controls, and other resource files for a Blackbird application. The package would download when a user activated the application for the first time, or otherwise to update the package already on a user's system. Microsoft also advertised that Blackbird would take advantage of features within Windows 95 like shortcuts, and would allow the user to automatically schedule the delivery of content.
There were three components to the platform — an authoring system called the Blackbird Designer, a visual drag-and drop environment similar to that included with Visual Basic; the Blackbird Server, which ran on Windows NT; and the Blackbird Client, a runtime module to lets users access and run Blackbird applications. URLs for Blackbird applications were OLE monikers.
Microsoft argued that Blackbird development would be cross-platform, since OLE support had already existed on Macintosh and there was work in progress on porting it to Unix systems. To guarantee security, the company planned to act as a certifying authority for OLE controls (OCXs), and encourage third parties to be certifying authorities.
Project history
Blackbird was announced in March 1995 as part of the upcoming Microsoft Network, and by August, it had been clear that Microsoft intended it to run more widely over Internet protocols. The technology was later demonstrated on MSN and Microsoft released a beta version of the developer tools, but by the end of 1996, when plans for a new version were announced, the designer then renamed to "Internet Studio", they disclosed they would not use the proprietary Blackbird file formats, but rather, standard HTML. It soon became clear the original project was effectively scrapped, and the designer later became Visual InterDev, a general web content creation tool for creating HTML and developing server pages using ASP. Also included was the ability to author ActiveX controls — OLE controls that could be embedded in HTML pages through a plug-in. These would be key parts to Microsoft's Active Platform strategy.
It was later revealed that Blackbird had severe performance problems because of an over-complex architecture which made excessive use of multi-threading. When prototypes of the Trident HTML layout engine were completed, and it was shown that the goals of complex layout in Blackbird could be achieved in HTML at better performance, it led to executives to rethink the project.
Mark Anders, a former head of the IIS team at Microsoft, has cited Blackbird as an example of how Microsoft has a tendency to over-complicate software and compared it to other projects like Longhorn.