trang in build

25 Nov 2016

      The `trang` in P5/Utilities/lib/trang.jar is version 20030619. The
`trang` I use on my desktop is version 20131210. The former
incorrectly converts [1] into [2]; the latter correctly converts it
into [3]. (Notice that [2] has "*?", whereas [3] puts in a layer of
parens, so you correctly get "*)?", which is silly but at least
valid.)

Now, I realize that [1] has problems (Why is there an <optional>
child of <zeroOrMore>? Why is there a <choice> of only one value?),
and we may want to address those, too. But in the meantime, is there
any reason not to switch our trang to a newer version?

[1], snippet of RNG
---- ------- -- ---
<attribute name="otherLangs">
  <a:documentation>(other languages) one or more codes identifying any other languages used in the bibliographic work.</a:documentation>
  <list>
    <zeroOrMore>
      <optional>
        <choice>
          <data type="language"/>
          <choice>
            <value/>
            <a:documentation/>
          </choice>
        </choice>
      </optional>
    </zeroOrMore>
  </list>
</attribute>

[2], RNG converted to RNC by P5/Utilities/lib/trang.jar (whitespace tweaked)
---- --- --------- -- --- -- -------------------------- ----------- --------
## (other languages) one or more codes identifying any other languages used in the bibliographic work.
  attribute otherLangs {
    list {
      (
         xsd:language
         |
         (##
          "")
      )?*
    }
  }

[3], RNG converted to RNG by `trang` on my desktop (whitespace tweaked)
---- --- --------- -- --- -- ------- -- -- ------- ----------- --------
## (other languages) one or more codes identifying any other languages used in the bibliographic work.
  attribute otherLangs {
    list {
      (
        (
           xsd:language
           | (
           (##
            "")
        )?
      )*
    }
  }

Syd Bauman

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