448 lines
15 KiB
HTML
448 lines
15 KiB
HTML
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<!-- @author David Chandler -->
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<!-- @date-created May 18, 2003 -->
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<meta name="keywords" content="tibetan fonts, tibetan software, digital ethnography">
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<meta name="description" content="This presents intellectual and electronic tools for using Tibetan language in a digital medium and for viewing the THDL site.">
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Always incorporate Tibetan and Himalayan
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<title>Tibetan Machine Web Converter</title>
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INSERT THE BREADCRUMBS
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<div align="right"><font color="#000000"><A HREF="http://iris.lib.virginia.edu/tibet/index.html">THDL</A> : <A HREF="http://iris.lib.virginia.edu/tibet/tools/index.html">Tools</A> : <a href="http://iris.lib.virginia.edu/tibet/tools/software.html">Software</a> : Tibetan Machine Web Converter</a></font>
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The first section of text is the short "introduction" about the Theme and the various discplines that have a vested interest in them.
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Design principle: Bold the first few words of this text section.
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==============
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<h2>Tibetan Machine Web Converter</h2>
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<p>
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In the same JAR file as Jskad, power users will find a command-line
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utility that converts Tibetan documents from one digital
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representation to another. The converter embodies the same
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technology as Jskad itself, but often works even when Jskad fails
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due to Java's presently poor support for viewing RTF
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documents. This command-line utility converts a Tibetan
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Machine Web-encoded (TMW-encoded) Rich Text Format (RTF) file to
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either of these three output formats:
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</p>
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<ul>
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<li>RTF files in Unicode</li>
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<li>RTF files with the appropriate THDL Extended Wylie (Wylie) used
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instead of TMW</li>
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<li>RTF files in Tibetan Machine (used in legacy systems)</li>
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</ul>
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<p>
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In addition, this converter can convert Tibetan Machine RTF files to
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Tibetan Machine Web RTF files, and takes precautions to ensure that
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only a 100% perfect conversion is done in both directions
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(TM->TMW and TMW>TM). One such precaution is that two
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independent teams (Garrett and Garson, Chandler) turned the Tibetan
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Machine Web <a
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href="http://iris.lib.virginia.edu/tibet/tools/tmw.html#doc">
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documentation</a> into TM<->TMW tables. These tables
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were compared, giving full confidence that the tables are as
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accurate as the documentation (which has a <a
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href="http://sourceforge.net/tracker/index.php?func=detail&aid=746871&group_id=61934&atid=502515">
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few flaws</a> itself). That documentation has not been
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extensively verified against the actual fonts, however.
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Another precaution is that any unknown characters cause the
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conversion to fail, and the result is a document containing merely
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the unknown characters. (There are some known, illegal glyphs
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created by Tibet Doc, and the converter handles the ones it knows of
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and treats the rest as unknown.)
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</p>
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<p>
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This converter is smart enough to solve the "curly-brace
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problem", wherein Tahoma '{', '}', and '\' characters appear
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instead of the TMW stacks they are supposed to represent. This
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problem originates with certain versions of Microsoft Word's Rich
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Text Format writing capabilities.
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</p>
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<p>
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Further, this converter gives a polite error message when a given
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.rtf file simply cannot be read by the version of Java used.
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</p>
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<p>
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Perhaps most importantly, the converter has a
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<tt>--find-some-non-tmw</tt> mode of operation that gives you, the
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user, confidence that RTF reading and writing idiosyncrasies are not
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going to interfere with a flawless conversion. It does so by
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printing out the first occurrence of a given character in a non-TMW
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font. Here is some example output:
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</p>
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<pre>
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java -cp "c:\my thdl tools\Jskad.jar" \
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org.thdl.tib.input.TibetanConverter \
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--find-some-non-tmw \
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"Dalai Lama Fifth History 01.rtf"
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Non-TMW character newline [decimal 10] in the font Tahoma appears first at location 39
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Non-TMW character ' ' [decimal 32] in the font TimesNewRoman appears first at location 45
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Non-TMW character '}' [decimal 125] in the font Tahoma appears first at location 66
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Non-TMW character '{' [decimal 123] in the font Tahoma appears first at location 219
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Non-TMW character '\' [decimal 92] in the font Tahoma appears first at location 1237
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Non-TMW character newline [decimal 10] in the font Times New Roman appears first at location 9754
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</pre>
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<p>
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Given the above output, you can be sure that a flawless conversion
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(barring the appearance of <a href="#knownbugs">known bugs</a>) will
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result when you run <tt>java -cp "c:\my thdl tools\Jskad.jar"
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org.thdl.tib.input.TibetanConverter --to-wylie "Dalai Lama Fifth
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History 01.rtf" > "Dalai Lama Fifth History 01 in THDL Extended
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Wylie.rtf"</tt>. (Note that the '>' causes the output to be
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directed to the file named thereafter; this is quite handy.)
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This is because the only text in the input file besides Tibetan is
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whitespace and the Tahoma characters <tt>'{'</tt>, <tt>'}'</tt>, and
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<tt>'\'</tt>. These Tahoma characters are understood by the tool;
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they are symptoms of the "curly-brace problem".
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</p>
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<h3>Failed Conversions</h3>
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<p>
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In this section, you'll learn how to tell if a conversion has
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succeeded in full, ran into minor problems, or failed altogether.
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</p>
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<h4>TMW to Wylie</h4>
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<p>
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Note that some TMW glyphs have no transliteration in Exteded
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Wylie. When you encounter such a glyph, you'll find
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<tt>\tmwXYYY</tt> in your output, where X tells you which TMW font
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the troublesome glyph comes from and YYY is the decimal number of
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the glyph in that font (which is a number between 000 and 255
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inclusive, usually between 33 and 126). The following are
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values corresponding to X:
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</p>
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<ul>
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<li>
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When X is 0, the TibetanMachineWeb font contains the glyph.
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</li>
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<li>
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When X is 1, the TibetanMachineWeb1 font contains the glyph.
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</li>
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<li>
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When X is 2, the TibetanMachineWeb2 font contains the glyph.
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</li>
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<li>
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When X is 3, the TibetanMachineWeb3 font contains the glyph.
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</li>
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<li>
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When X is 4, the TibetanMachineWeb4 font contains the glyph.
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</li>
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<li>
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When X is 5, the TibetanMachineWeb5 font contains the glyph.
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</li>
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<li>
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When X is 6, the TibetanMachineWeb6 font contains the glyph.
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</li>
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<li>
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When X is 7, the TibetanMachineWeb7 font contains the glyph.
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</li>
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<li>
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When X is 8, the TibetanMachineWeb8 font contains the glyph.
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</li>
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<li>
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When X is 9, the TibetanMachineWeb9 font contains the glyph.
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</li>
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</ul>
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<p>
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Upon finding a <tt>\tmwXYYY</tt> sequence in your output, you should
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consult the <a
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href="http://iris.lib.virginia.edu/tibet/tools/tmw.html#doc">
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documentation</a> for the specific TMW font named. Find the
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glyph (by its YYY value) and decide how to proceed. If you
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find a glyph that you believe should have been converted into
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Extended Wylie by the tool, please report this as a bug through the
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SourceForge website or via e-mail.
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</p>
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<h4>Other Conversions</h4>
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<p>
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The other conversions are all-or-nothing. That is, if you run
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into any trouble whatsoever, the result will be a file containing
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just the problematic glyphs, each preceded by achen (i.e., U+0F68,
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the letter whose THDL Extended Wylie representation is 'a').
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If your result is as long as your input, then the conversion went
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flawlessly.
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</p>
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<p>
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There is one TMW glyph (TibetanMachineWeb7, glyph 91 [\tmw7091])
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that has no Tibetan Machine equivalent. This glyph is the only
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TMW glyph that can cause a TMW->TM conversion to fail. It
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is fairly common, though, especially if you've used Jskad to prepare
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your document. It might be appropriate to change the document
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to use TibetanMachineWeb7, glyph 90 [\tmw7090], a similar glyph that
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does have a TM equivalent.
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</p>
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<p>
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You might consider using Jskad to convert documents that give
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errors, as it has better error reporting and can tell you just
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what's wrong.
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</p>
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<p>
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If you ever encounter problems in a TM->TMW conversion, please
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send us mail with the error report (and the problem input document's
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resulting document) so that we can improve our tools.
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</p>
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<h3>Invoking the Converter</h3>
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<p>
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First add Jskad.jar to your CLASSPATH. You can do this by
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setting an environment variable CLASSPATH to contain the absolute
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path of the Jskad.jar file and then running the command <tt>java
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org.thdl.tib.input.TibetanConverter</tt>. Alternatively, you
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can use <code>java -cp "c:\my tibetan documents\Jskad.jar"
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org.thdl.tib.input.TibetanConverter</code> where you put in the
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appropriate path to Jskad.jar. You will see usage information
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appear if you do this correctly; you'll see a message like
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<code>java.lang.NoClassDefFoundError:
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org/thdl/tib/input/TibetanConverter; Exception in thread
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"main"</code> if you've not correctly told Java where to find
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Jskad.jar.
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</p>
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<h3><a name="knownbugs"></a>Known Bugs</h3>
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<p>
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All known bugs are listed in this section. They're more likely
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to be fixed if users complain, so complain away.
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</p>
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<p>
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First, if the TMW given is not syntactically legal, then the Wylie
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that results will not necessarily yield, if imported into Jskad, the
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same Tibetan with which the converter started. The glyphs
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corresponding to the Wylie 'jaskadaskeda' have this problem, for
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example.
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</p>
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<p>
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Please
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<a href="mailto:thdltools-devel@lists.sourceforge.net">
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e-mail us</a>
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your comments about this page.
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</p>
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<p>
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The
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<a target="_blank" href="http://www.sourceforge.net/projects/thdltools">
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THDL Tools</a>
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project is generously hosted by:
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