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+Historical Permission Notice and Disclaimer
+http://opensource.org/licenses/HPND
+
+---
+
+<copyright notice>
+
+Permission to use, copy, modify and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies[,]
+[and] that both [that] [the] copyright notice and this permission
+notice appear in supporting documentation[, and that the name [of]
+<copyright holder> [or <related entities>] not be used in advertising
+or publicity pertaining to distribution of the software without
+specific, written prior permission]. [<copyright holder> makes
+no representations about the suitability of this software for any
+purpose. It is provided "as is" without express or implied warranty.]
+
+[<copyright holder> DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS[,][.] IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.]
+
+---
+
+Explanation:
+
+Angle brackets hold "fields", e.g. <copyright holder>.
+
+Square brackets hold optional text, e.g. [or <related entities>].
+
+A license can have variations in capitalization and whitespace, and
+still be considered an instance of this template.
+
+It may be possible to construct a grammatically incorrect license from
+this template, or one that lacks a disclaimer, or one that includes a
+double-disclaimer. That is acceptable, as long as it remains impossible
+to construct a non-OSD-compliant license that matches the pattern.