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<h3><a name="secB.39.2">B.39.2 Items Checked</a></h3>
<p>Votlint checks that the XML input is well-formed, and, unless the
<code>valid=false</code> parameter is supplied, that it validates against the
1.0 DTD or 1.1, 1.2 or 1.3 schema as appropriate.
Some of the validity checks are also done by
<code>votlint</code> internally, so that some validity-type
errors may give rise to more than one warning.
In general, the program errs on the side of verbosity.
</p>
<p>In addition to these checks, the following checks are carried out,
and lead to ERROR reports if violations are found:
<ul>
<li><code>TD</code> contents incompatible
<code>datatype</code>/<code>arraysize</code> attributes declared
in <code>FIELD</code></li>
<li>BINARY/BINARY2 data streams which don't match metadata
declared in <code>FIELD</code></li>
<li><code>PARAM</code> values incompatible with declared
<code>datatype</code>/<code>arraysize</code></li>
<li>Meaningless <code>arraysize</code> declarations
</li>
<li>Array-valued <code>TD</code> elements with the wrong number of elements
</li>
<li>Array-valued <code>PARAM</code> values with the wrong number of
elements
</li>
<li><code>nrows</code> attribute on <code>TABLE</code> element different
from the number of rows actually in the table
</li>
<li><code>VOTABLE</code> <code>version</code> attribute is unknown
</li>
<li><code>ref</code> attributes without matching <code>ID</code> elements
elsewhere in the document
</li>
<li>Same <code>ID</code> attribute value on multiple elements.
</li>
</ul>
</p>
<p>Additionally, the following conditions, which are not actually
forbidden by the VOTable standard, will generate WARNING reports.
Some of these may result from harmless constructions, but it is
wise at least to take a look at the input which caused them:
<ul>
<li>Wrong number of <code>TD</code> elements in row of <code>TABLEDATA</code>
table
</li>
<li>Mismatch between VOTable and FITS column metadata for
FITS data encoding
</li>
<li><code>TABLE</code> with no <code>FIELD</code> elements
</li>
<li>Use of deprecated attributes</li>
<li><code>FIELD</code> or <code>PARAM</code> elements with
<code>datatype</code> of either
<code>char</code> or <code>unicodeChar</code>
and undeclared <code>arraysize</code> -
this is a common error which can result in
ignoring all but the first character in <code>TD</code> elements from
a column
</li>
<li><code>ref</code> attributes which reference other elements by
<code>ID</code> where the reference makes no, or questionable sense
(e.g. <code>FIELDref</code> references <code>FIELD</code> in a
different table)
</li>
<li>Multiple sibling elements (such as <code>FIELD</code>s) with the
same <code>name</code> attributes
</li>
</ul>
</p>
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<b>Previous: </b><a href="votlint-usage.html">Usage</a><br>
<hr><i>STILTS - Starlink Tables Infrastructure Library Tool Set<br>Starlink User Note256<br>STILTS web page:
<a href="http://www.starlink.ac.uk/stilts/">http://www.starlink.ac.uk/stilts/</a><br>Author email:
<a href="mailto:m.b.taylor@bristol.ac.uk">m.b.taylor@bristol.ac.uk</a><br>Mailing list:
<a href="mailto:topcat-user@jiscmail.ac.uk">topcat-user@jiscmail.ac.uk</a><br></i></body>
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