Designing for change

Balisage series on markup technologies Pub Date : 2011-01-01 DOI:10.4242/balisagevol27.sperberg-mcqueen01

Gunilla Finrow, Don Peting, Rob Harbour, Mark Preiss, Nancy Conard, Larry Kwarsick, Larry Cort, Mimi Sheridan, Rick Castellano, Peter Keyes

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Abstract

Invisible XML (ixml) is a method for treating non-XML documents as if they were XML. The 1.0 specification for Invisible XML was announced in June of this year. No technology foresees all of its use cases, especially in 1.0. How can ixml allow experimentation, and channel experimentation in useful ways, to allow ideas to be expressed in ixml grammars that go beyond what is foreseen, without compromising interoperability or the value of strict conformance to the specification? Many programming languages (C, JavaScript, Pascal, XQuery, etc.) address this question with pragmas. A pragma is a semi-formal way to instruct a processor/compiler/interpreter how it should operate. Typical pragmas extend a specification but are not a part of it. We propose pragmas as an optional add-on to ixml to allow implementation of non-standardized functionality in a way that does not interfere with standard ixml processing. We describe our general framework for pragmas, some specific pragmas (to illustrate how pragmas can be used), and a few pragmatic implementations.

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为变化而设计

不可见XML (ixml)是一种将非XML文档当作XML来处理的方法。今年6月公布了不可见XML的1.0规范。没有一种技术能够预见到它的所有用例，尤其是在1.0中。ixml如何允许实验，并以有用的方式引导实验，从而允许用超出预期的ixml语法表达思想，而不损害互操作性或严格遵守规范的价值?许多编程语言(C、JavaScript、Pascal、XQuery等)都用pragma来解决这个问题。pragma是一种半正式的方式，指示处理器/编译器/解释器应该如何操作。典型的pragma扩展了规范，但不是规范的一部分。我们建议将pragmas作为ixml的可选附加组件，以允许以不干扰标准ixml处理的方式实现非标准化功能。我们描述了pragma的一般框架、一些特定的pragma(以说明如何使用pragma)和一些实用的实现。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Balisage series on markup technologies

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