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+Exempi is an implementation of XMP. Version 1.99.x is based on
+Adobe XMP SDK 4.1.1 and released under a BSD-style license like
+Adobe's.
+
+The Adobe Extensible Metadata Platform (XMP) is a standard for
+processing and storing standardized and proprietary metadata,
+created by Adobe Systems Inc..
+
+XMP standardizes the definition, creation, and processing of
+extensible metadata. Serialized XMP can be embedded into a
+significant number of popular file formats, without breaking
+their readability by non-XMP-aware applications. Embedding
+metadata ("the truth is in the file") avoids many problems
+that occur when metadata is stored separately. XMP is used
+in PDF, photography and photo editing applications.
+
+The API is C based and means to be used from any language and
+be easier to maintain ABI stability.
+
+The overall changes include:
+
+* STABLE C API/ABI for the library, instead of a C++ template
+ based version.
+* GNU friendly build system based on automake.
+* Code changes for UN*X systems compatibility.
+* Architecture support for 64-bits (x86_64) and others.
+* Test suite.
+
+exempi requires the boost library. A buildscript is available
+at slackbuilds.org