Re: [tei-council] fun with min and max

27 Nov 2016

      So it seems I was mistaken in thinking I was using your stylesheets branch? I will take another look tomorrow. Past my bedtime now.

Sent from my Honor Mobile

-------- Original Message --------
Subject: Re: [tei-council] fun with min and max
From: Syd Bauman
To: tei-council@lists.tei-c.org
CC:

Thank you, Lou! Really appreciate that someone else took the time to
have fun with min and max. (Great name for a pair of dogs, especially
if one is diminutive and one is large.:-)

Hmmm ... First, I had to look up what "krekt" stands for. Thank
goodness for Wiktionary.

But I get different results, possibly because I haven't pushed up a
few changes, but I'm not sure (I didn't think any of those changes
would affect this, but hey, if I really understood this it wouldn't
take > 3 days!)

With the snippet of ODD provided in [1], I get the following RNC
outputs:

 1) ( text | hi )+
    Correct! (Note that because 'text' matches the empty string, it
    makes no practical difference whether the <rng:choice> is allowed
    oneOrMore or zeroOrMore times.)

 2) ( text | ( name, name ) )
    Seems completely correct to me, but nothing like what Lou got.

 3) ( title?, ( name, name, (name, name? )? ) )
    Correct! (And deterministic, to boot.) But again, nothing like
    what Lou got.

And I have never looked at DTD or XSD. The latter is generated by
`trang`, so in theory should be correct if handed correct,
deterministic, RNG. The former is generated by odd2dtd.xsl, which I
hope to have a look at tomorrow.

P.S. I've already pushed up a new P5/Test/testerrmav.odd that
includes the snippet below. I will push up changes to teiodds.xsl to
sydb-occurs2 branch of Stylesheets in a few mins, I hope.

below
-----
[1]
<tmp:ODD_snippet xmlns="http://www.tei-c.org/ns/1.0">
  <elementSpec ident="loub1" mode="add">
    <classes mode="replace">
      <memberOf key="att.global"/>
      <memberOf key="model.hiLike"/>
    </classes>
    <content>
      <alternate  maxOccurs="unbounded">
        <textNode/>
        <elementRef key="hi" />
      </alternate>
    </content>
  </elementSpec>
  <elementSpec ident="loub2" mode="add">
    <classes mode="replace">
      <memberOf key="att.global"/>
      <memberOf key="model.hiLike"/>
    </classes>
    <content>
      <alternate>
        <textNode/>
        <elementRef key="name" minOccurs="2"/>
      </alternate>
    </content>
  </elementSpec>
  <elementSpec ident="loub3" mode="add">
    <classes mode="replace">
      <memberOf key="att.global"/>
      <memberOf key="model.hiLike"/>
    </classes>
    <content>
      <sequence>
        <elementRef key="title" minOccurs="0" maxOccurs="1"/>
        <elementRef key="name" minOccurs="2" maxOccurs="4"/>
      </sequence>
    </content>
  </elementSpec>
</tmp:ODD_snippet>
...
I started trying to test this, but didnt get very far.
1. What happens to a content model like this:
     <alternate  maxOccurs="unbounded">
               <textNode/>
               <elementRef key="hi" />
     </alternate>
in RNC (using Syd's latest version of stylesheetes -- I think )
this gives us (text|hi)+ [krekt]
in DTD I get  (#PCDATA|hi)* which is not quite krekt but at least is valid
in XSD I get
     <xs:complexType mixed="true">
       <xs:sequence>
         <xs:element minOccurs="0" maxOccurs="unbounded" ref="tei:hi"/>
       </xs:sequence>
  <!-- ... -->
i.e same as DTD. good.
2. Let's try using minOccurs
<alternate>
    <textNode/>
    <elementRef key="name" minOccurs="2"/>
</alternate>
generates
in RNC :  (name+ | name+ | text)  (?WTF?)
in DTD : (#PCDATA|hi)* again [I think the presence of a textnode always
generates a mixed content like this. Which is fine]
in XSD  <xs:complexType mixed="true">
       <xs:choice minOccurs="0">
         <xs:element maxOccurs="unbounded" ref="tei:name"/>
         <xs:element maxOccurs="unbounded" ref="tei:name"/>
       </xs:choice>
...
     </xs:complexType>
[which won't do because it is invalid XSD,  cos nonambig)
3. Maybe the textnode is special. Let's try something faintly plausible
   <sequence>
    <elementRef key="title" minOccurs="0" maxOccurs="1"/>
    <elementRef key="name" minOccurs="2" maxOccurs="4"/>
    </sequence>
in RNC :   (title?, name, name)
in DTD : <!ELEMENT ab (((title)?,name,name,name,name))>
in XSD :  <xs:sequence>
         <xs:element minOccurs="0" ref="tei:title"/>
         <xs:element ref="tei:name"/>
         <xs:element ref="tei:name"/>
       </xs:sequence>
None of these of course will validate something with 3 names, even
though the ODD content model suggests they should.
I conclude we're all doomed. But you knew that already.
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--
 Syd Bauman, EMT-Paramedic
 Senior XML Programmer/Analyst
 Northeastern University Women Writers Project
 s.bauman@northeastern.edu or
 Syd_Bauman@alumni.Brown.edu

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Re: [tei-council] fun with min and max

Lou Burnard