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2004.02.15

CE.NET or XP Embedded?

技術が進んだことで、分野間の壁がなくなってきていて、いろいろな判断が難しくなってきている。PC と 家電 もその一つだが、今私がコンサルティングしているところでは組み込み系 OS の議論が盛んになってきている。
Windows CE と Linux を検討していたところへ、XP Embedded も検討候補に加えるよう進言した。コストは上がるが、開発コストは下がる。短期に半分研究目的であれば最適解かもしれない。技術的には OQO のような XP 搭載 PC が作れてしまう。
CE.NET もばかにしたものではない。CE.NET の悲劇は、Pocket PC が CE.NET の全機能を含んでいないので、Pocket PC の機能をベースにみなが CE.NET を理解してしまっているところかもしれない。実は CE.NET の API はかなりのものである。この話はまた次回に譲るが、API だけで比べてしまえば CE.NET も XP に遜色ないものを備える。たとえば Pocket IE は貧弱だが、CE.NET は IE6 も持っている。Pocket PC が IE6 を省いた構成にしているだけだが、これは意外に知られていない。
しかし一番の問題は開発環境であろう。MFC, ATL, .NET と揃った XP に比べ、CE.NET は弱い。Compact .NET Framework はより小さいデバイスへ向かう方向のようで、組み込みで CE.NET を使うためにより .NET Framework に近い Compact .NET Framework というものはマイクロソフトのターゲットに入っていない模様である。技術的に見れば、マイクロソフト的にはそこは XP Embedded を使って欲しいということなのかもしれない。しかしハードやライセンスのコストも含め、XP Embedded と CE.NET の差は大きい。CE.NET なら Linux の競合になれるが、XP Embedded は精神的にも難しい面が多い。コスト面と機能面で Linux と渡り合え、開発環境が優れています、という組み合わせがないのが現状だ。
Visusl Studio .NET の次版である Whidbey では Compact .NET Framework の開発環境も拡充されるとのことだが、どこまでのものになるかは未発表のため詳細が不明である。これも調べが進んだらブロッグしてみたい。

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