Technology companies take out controversial patents on software or on such "ideas" as being able to order books with a single click, opening patentsystems to ridicule.
DRM involves not only the technical means such as the encryption of digital content, but also some related management measures such as the establishment of trust and patentsystems.
DRM不仅包括数字内容的加密维护等技术办法,还包括信赖和专利体系树立等管理办法。
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This is a relaxed license that asks for little more than patent protection and attribution, making it suitable for integrating into build systems and the like.