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Since Regina version 3.0, data files are now saved in an optionally compressed XML format. If a data file is compressed, it can be piped through gunzip to recover the plain text XML.
This reference chapter documents the various XML elements that form
a Regina data file and how they are used. The top-level element
for a data file is reginadata
.
Regarding international characters: As of Regina version 4.5 (May 2008), all XML data is encoded using UTF-8 (which includes plain ASCII as a subset). In versions 4.4 and earlier, data was encoded in LATIN1 without declaring this explicitly in the XML header; Regina is aware of this, and treats all older data files as LATIN1 when they are loaded.
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