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+These documents describe a free, public specification. They are
+provided by the authors under the following license. 
+
+By obtaining and/or copying this work, you agree that you have read,
+understand, and will comply with the terms and conditions that follow.
+
+Copyright 2023, Shaping Documents project members
+
+## Copying and redistributing the documents
+
+Permission is hereby granted to use, copy, and distribute this work in
+UNMODIFIED form, for any purpose, without fee or royalty, provided
+that you include the following on all copies of the document that you
+use:
+
+1. The above copyright notice.
+
+2. A link or URL to the original document.
+
+
+### Modifying
+
+No right to create modifications or derivatives of these documents is
+granted pursuant to this license, except as follows:
+
+1. References and quotations to facilitate implementation are
+   permitted as described below. 
+
+2. Translations of the full work into other languages are permitted,
+   provided that such translations retain this full license, including
+   the above copyright notice, provide a link or URL to the original
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+   the original work. Such a label must appear at the beginning of
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+3. Proposing and discussing patches, changes, and other updates is
+   permitted, and is not considered creating a modified or derivative
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+   
+The publication of derivative works of this document for use as a
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+  
+  
+## Implementation
+
+Implementing the behavior and logic described in these documents is
+not considered copying the work.
+
+Publishing or otherwise distributing an implementation of the behavior
+and logic described in these documents is not considered distributing
+or creating a derivative of the work.
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+Implementations of the behavior and logic described in these documents
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+
+
+### Code components and symbol names
+
+Code components, formulas, and symbols or tokens (including the names
+used for constants, variables, and functions), clearly distinguished
+by formatting as code elements in the work, are provided as
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+
+Usages of these examples in an implementation of the behavior and
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+
+Permission is hereby granted to use, copy, and distribute these code
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+
+
+### References and quotations
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+To facilitate implementation of the specification set forth in this
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+accompany software, and in documentation of software, provided that:
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+1. The software source, materials, or documentation including such a
+   quotation includes the above copyright notice and a link or URL to
+   the original document.
+   
+2. As space permits, each file including such a quotation includes a
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+   
+3. Such quotations retain any chapter and section numbering as
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+4. Such quotations do not exceed 20% of the length of this work.
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+
+## Disclaimers
+
+These documents are provided "as is", without warranty of any kind,
+express or implied.