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Overview
Comment:Added text constrain cmd base64.
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SHA3-256: 68cd47d57ce993f6f86ecaa2abbfaee6186c3e4692c12e1672a5ab3e32bb2e2e
User & Date: rolf 2019-05-06 23:18:53
Context
2019-05-09
18:33
Merged from trunk. check-in: 05a6175f48 user: rolf tags: schema
2019-05-06
23:18
Added text constrain cmd base64. check-in: 68cd47d57c user: rolf tags: schema
2019-05-02
16:53
Added text constraint commands id and idref. check-in: a886296dc3 user: rolf tags: schema
Changes
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<html>
<head>
<link rel="stylesheet" href="manpage.css"><title>tDOM manual: schema</title><meta name="xsl-processor" content="Jochen Loewer ([email protected]), Rolf Ade ([email protected]) et. al."><meta name="generator" content="$RCSfile: tmml-html.xsl,v $ $Revision: 1.11 $"><meta charset="utf-8">
</head><body>
<div class="header">
<div class="navbar" align="center">
<a href="#SECTid0x5588b7db8b30">NAME</a> · <a href="#SECTid0x5588b7db9160">SYNOPSIS</a> · <a href="#SECTid0x5588b7db35d0">DESCRIPTION </a> · <a href="#SECTid0x5588b7e11e10">Schema definition scripts</a> · <a href="#SECTid0x5588b7e1a140">Quantity specifier</a> · <a href="#SECTid0x5588b7e1bfd0">Text constraint scripts</a> · <a href="#SECTid0x5588b7e23fe0">Exampels</a>
</div><hr class="navsep">
</div><div class="body">
  <h2><a name="SECTid0x5588b7db8b30">NAME</a></h2><p class="namesection">
<b class="names">tdom::schema - </b><br>Create a schema validation command</p>

  <h2><a name="SECTid0x5588b7db9160">SYNOPSIS</a></h2><pre class="syntax">package require tdom

<b class="cmd">tdom::schema</b> <i class="m">?create?</i> <i class="m">cmdName</i>
    </pre>

  <h2><a name="SECTid0x5588b7db35d0">DESCRIPTION </a></h2><p>This command creates validation commands with a simple API. The
    validation commands have methods to define a schema and are able
    to validate XML or DOM trees (and to some degree other kind of
    hierarchical data) against this schema.</p><p>Additionally, a validation command may be used as argument to
    the <i class="m">-validateCmd</i> option of the <i class="m">dom parse</i> and the
    <i class="m">expat</i> commands to enable validation additional to what they
    otherwise do.</p><p>The valid methods of the created commands are:</p><dl class="commandlist">
      
................................................................................
        <dt><b class="method">reset</b></dt>
        <dd>This method resets the validation command into state
        READY (while preserving the defined grammer).</dd>
      

    </dl>

  <h2><a name="SECTid0x5588b7e11e10">Schema definition scripts</a></h2><p>Schema definition scripts are ordinary Tcl scripts that are
    evaluatend in the namespace tdom::schema. The below listed schema
    definition commands in this tcl namespace allow to define a wide
    variety of document structures. Every schema definition command
    establish a validation constraint on the content which has to
    match or must be optional to render the content as valid. It is a
    validation error if the element in the XML source has additional
    (not matched) content.</p><p>The schema definition commands are:</p><dl class="commandlist">
................................................................................
        call. This is meant as toplevel command of a <i>schemacmd
        define</i> script. This command is not allowed nested in an
        other definition script command and will raise error, if you
        call it there.</dd>
      
    </dl>

  <h2><a name="SECTid0x5588b7e1a140">Quantity specifier</a></h2><p>Serveral schema definition commands expects a quantifier as
    one of their arguments, which specifies how often the content
    particle specified by the command is expected. The valid values
    for a <i class="m">quant</i> argument are:</p><dl class="optlist">
      
        <dt><b>!</b></dt>
        <dd>The content particle must occur exactly once in valid
        documents. This is the default, if a quantifier is
................................................................................
        n to m times (both inclusive) in a row in valid documents. The
        quantifier must be a tcl list with two elements. Both elements
        must be integers, with n &gt;= 0 and n &lt; m.</dd>
      
    </dl><p>If an optional quantifier is not given then it defaults to * in
    case of the mixed command and to ! for all other commands.</p>

  <h2><a name="SECTid0x5588b7e1bfd0">Text constraint scripts</a></h2><p></p><p>The text constraint commands are:</p><dl class="commandlist">
      
        <dt><b class="cmd">isint</b></dt>
        <dd></dd>
      

      
        <dt>
................................................................................
      
        <dt><b class="cmd">idref</b></dt>
        <dd>This text constraint command expects the text to be a
        reference to an ID within the document. The referenced ID may
        be later in the document, that the reference. Several
        references within the document to one ID are possible.</dd>
      





    </dl>
  
  <h2><a name="SECTid0x5588b7e23fe0">Exampels</a></h2><p>The XML Schema Part 0: Primer Second Edition
    (<a href="https://www.w3.org/TR/xmlschema-0/">https://www.w3.org/TR/xmlschema-0/</a>) starts with this
    example schema:</p><pre class="example">
&lt;xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"&gt;

  &lt;xsd:annotation&gt;
    &lt;xsd:documentation xml:lang="en"&gt;
     Purchase order schema for Example.com.






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<html>
<head>
<link rel="stylesheet" href="manpage.css"><title>tDOM manual: schema</title><meta name="xsl-processor" content="Jochen Loewer ([email protected]), Rolf Ade ([email protected]) et. al."><meta name="generator" content="$RCSfile: tmml-html.xsl,v $ $Revision: 1.11 $"><meta charset="utf-8">
</head><body>
<div class="header">
<div class="navbar" align="center">
<a href="#SECTid0x5563b3e4fb10">NAME</a> · <a href="#SECTid0x5563b3e50170">SYNOPSIS</a> · <a href="#SECTid0x5563b3e4a5f0">DESCRIPTION </a> · <a href="#SECTid0x5563b3ea8fc0">Schema definition scripts</a> · <a href="#SECTid0x5563b3eb12f0">Quantity specifier</a> · <a href="#SECTid0x5563b3eb3180">Text constraint scripts</a> · <a href="#SECTid0x5563b3ebb590">Exampels</a>
</div><hr class="navsep">
</div><div class="body">
  <h2><a name="SECTid0x5563b3e4fb10">NAME</a></h2><p class="namesection">
<b class="names">tdom::schema - </b><br>Create a schema validation command</p>

  <h2><a name="SECTid0x5563b3e50170">SYNOPSIS</a></h2><pre class="syntax">package require tdom

<b class="cmd">tdom::schema</b> <i class="m">?create?</i> <i class="m">cmdName</i>
    </pre>

  <h2><a name="SECTid0x5563b3e4a5f0">DESCRIPTION </a></h2><p>This command creates validation commands with a simple API. The
    validation commands have methods to define a schema and are able
    to validate XML or DOM trees (and to some degree other kind of
    hierarchical data) against this schema.</p><p>Additionally, a validation command may be used as argument to
    the <i class="m">-validateCmd</i> option of the <i class="m">dom parse</i> and the
    <i class="m">expat</i> commands to enable validation additional to what they
    otherwise do.</p><p>The valid methods of the created commands are:</p><dl class="commandlist">
      
................................................................................
        <dt><b class="method">reset</b></dt>
        <dd>This method resets the validation command into state
        READY (while preserving the defined grammer).</dd>
      

    </dl>

  <h2><a name="SECTid0x5563b3ea8fc0">Schema definition scripts</a></h2><p>Schema definition scripts are ordinary Tcl scripts that are
    evaluatend in the namespace tdom::schema. The below listed schema
    definition commands in this tcl namespace allow to define a wide
    variety of document structures. Every schema definition command
    establish a validation constraint on the content which has to
    match or must be optional to render the content as valid. It is a
    validation error if the element in the XML source has additional
    (not matched) content.</p><p>The schema definition commands are:</p><dl class="commandlist">
................................................................................
        call. This is meant as toplevel command of a <i>schemacmd
        define</i> script. This command is not allowed nested in an
        other definition script command and will raise error, if you
        call it there.</dd>
      
    </dl>

  <h2><a name="SECTid0x5563b3eb12f0">Quantity specifier</a></h2><p>Serveral schema definition commands expects a quantifier as
    one of their arguments, which specifies how often the content
    particle specified by the command is expected. The valid values
    for a <i class="m">quant</i> argument are:</p><dl class="optlist">
      
        <dt><b>!</b></dt>
        <dd>The content particle must occur exactly once in valid
        documents. This is the default, if a quantifier is
................................................................................
        n to m times (both inclusive) in a row in valid documents. The
        quantifier must be a tcl list with two elements. Both elements
        must be integers, with n &gt;= 0 and n &lt; m.</dd>
      
    </dl><p>If an optional quantifier is not given then it defaults to * in
    case of the mixed command and to ! for all other commands.</p>

  <h2><a name="SECTid0x5563b3eb3180">Text constraint scripts</a></h2><p></p><p>The text constraint commands are:</p><dl class="commandlist">
      
        <dt><b class="cmd">isint</b></dt>
        <dd></dd>
      

      
        <dt>
................................................................................
      
        <dt><b class="cmd">idref</b></dt>
        <dd>This text constraint command expects the text to be a
        reference to an ID within the document. The referenced ID may
        be later in the document, that the reference. Several
        references within the document to one ID are possible.</dd>
      
      
        <dt><b class="cmd">base64</b></dt>
        <dd>This text constraint match if text is valid according to
        RFC 4648RFC 4648.</dd>
      
    </dl>
  
  <h2><a name="SECTid0x5563b3ebb590">Exampels</a></h2><p>The XML Schema Part 0: Primer Second Edition
    (<a href="https://www.w3.org/TR/xmlschema-0/">https://www.w3.org/TR/xmlschema-0/</a>) starts with this
    example schema:</p><pre class="example">
&lt;xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"&gt;

  &lt;xsd:annotation&gt;
    &lt;xsd:documentation xml:lang="en"&gt;
     Purchase order schema for Example.com.

Changes to doc/schema.n. 

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the ID isn't actually referenced within the document.
.TP
\&\fB\fBidref\fP
\&\fRThis text constraint command expects the text to be a
reference to an ID within the document. The referenced ID may
be later in the document, that the reference. Several
references within the document to one ID are possible.




.SH Exampels
.PP
.UR "https://www.w3.org/TR/xmlschema-0/"
<URL: https://www.w3.org/TR/xmlschema-0/>
.UE
The XML Schema Part 0: Primer Second Edition
() starts with this







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the ID isn't actually referenced within the document.
.TP
\&\fB\fBidref\fP
\&\fRThis text constraint command expects the text to be a
reference to an ID within the document. The referenced ID may
be later in the document, that the reference. Several
references within the document to one ID are possible.
.TP
\&\fB\fBbase64\fP
\&\fRThis text constraint match if text is valid according to
RFC 4648RFC 4648.
.SH Exampels
.PP
.UR "https://www.w3.org/TR/xmlschema-0/"
<URL: https://www.w3.org/TR/xmlschema-0/>
.UE
The XML Schema Part 0: Primer Second Edition
() starts with this

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      <commanddef>
        <command><cmd>idref</cmd></command>
        <desc>This text constraint command expects the text to be a
        reference to an ID within the document. The referenced ID may
        be later in the document, that the reference. Several
        references within the document to one ID are possible.</desc>
      </commanddef>





    </commandlist>
  </section>
  
  <section>
    <title>Exampels</title>

    <p>The XML Schema Part 0: Primer Second Edition







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      <commanddef>
        <command><cmd>idref</cmd></command>
        <desc>This text constraint command expects the text to be a
        reference to an ID within the document. The referenced ID may
        be later in the document, that the reference. Several
        references within the document to one ID are possible.</desc>
      </commanddef>
      <commanddef>
        <command><cmd>base64</cmd></command>
        <desc>This text constraint match if text is valid according to
        RFC 4648RFC 4648.</desc>
      </commanddef>
    </commandlist>
  </section>
  
  <section>
    <title>Exampels</title>

    <p>The XML Schema Part 0: Primer Second Edition

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    CHECK_TOPLEVEL
    checkNrArgs (1,1,"no argument expected");
    ADD_CONSTRAINT (sdata, sc)
    sc->constraint = idrefImpl;
    sc->constraintData = (void *)sdata;
    return TCL_OK;
}



























































void
tDOM_SchemaInit (
    Tcl_Interp *interp
    )
{
    /* Inline definition commands. */
................................................................................
                          stripTCObjCmd, NULL, NULL);
    Tcl_CreateObjCommand (interp,"tdom::schema::text::split",
                          splitTCObjCmd, NULL, NULL);
    Tcl_CreateObjCommand (interp,"tdom::schema::text::id",
                          idTCObjCmd, NULL, NULL);
    Tcl_CreateObjCommand (interp,"tdom::schema::text::idref",
                          idrefTCObjCmd, NULL, NULL);


}


#endif  /* #ifndef TDOM_NO_SCHEMA */







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    CHECK_TOPLEVEL
    checkNrArgs (1,1,"no argument expected");
    ADD_CONSTRAINT (sdata, sc)
    sc->constraint = idrefImpl;
    sc->constraintData = (void *)sdata;
    return TCL_OK;
}

static int
base64Impl (
    Tcl_Interp *interp,
    void *constraintData,
    char *text
    )
{
    int chars = 0, equals = 0;
    
    while (*text != '\0') {
        if (SPACE(*text)) {
            text++;
            continue;
        }
        if (   (*text >= 'A' && *text <= 'Z')
            || (*text >= 'a' && *text <= 'z')
            || (*text >= '0' && *text <= '9')
            || (*text = '+')
            || (*text = '/')) {
            chars++;
            text++;
            continue;
        }
        if (equals < 2 && *text == '=') {
            equals++;
            text++;
            continue;
        }
        break;
    }
    if (*text) {
        return 0;
    }
    if ((chars + equals) % 4 != 0) {
        return 0;
    }
    return 1;
}

static int
base64TCObjCmd (
    ClientData clientData,
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[]
    )
{
    SchemaData *sdata = GETASI;
    SchemaConstraint *sc;

    CHECK_TI
    CHECK_TOPLEVEL
    checkNrArgs (1,1,"No arguments expected");
    ADD_CONSTRAINT (sdata, sc)
    sc->constraint = base64Impl;
    return TCL_OK;
}

void
tDOM_SchemaInit (
    Tcl_Interp *interp
    )
{
    /* Inline definition commands. */
................................................................................
                          stripTCObjCmd, NULL, NULL);
    Tcl_CreateObjCommand (interp,"tdom::schema::text::split",
                          splitTCObjCmd, NULL, NULL);
    Tcl_CreateObjCommand (interp,"tdom::schema::text::id",
                          idTCObjCmd, NULL, NULL);
    Tcl_CreateObjCommand (interp,"tdom::schema::text::idref",
                          idrefTCObjCmd, NULL, NULL);
    Tcl_CreateObjCommand (interp,"tdom::schema::text::base64",
                          base64TCObjCmd, NULL, NULL);
}


#endif  /* #ifndef TDOM_NO_SCHEMA */

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        {<doc><idref idref="abc"/><idref idref="123"/></doc>}
    } {
        lappend result [s validate $xml]
    }
    s delete
    set result
} {1 1 0 1 1 1 1 0 0 0}

























test schema-15.1 {constraint cmd tcl} {
    tdom::schema s
    s define {
        defelement a {
            tcl append ::schema-15.1
            element b







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    } {
        lappend result [s validate $xml]
    }
    s delete
    set result
} {1 1 0 1 1 1 1 0 0 0}

test schema-14.27 {base64} {
    tdom::schema s
    s define {
        defelement doc {
            text base64
        }
    }
    set result [list]
    foreach xml {
        <doc/>
        {<doc>ZVL1</doc>}        
        {<doc>zvL1</doc>}        
        {<doc>zvü1</doc>}        
        {<doc>0a BED   E+9</doc>}        
        {<doc>ub1sU3==</doc>}        
        {<doc>abc</doc>}        
        {<doc>===</doc>}        
    } {
        lappend result [s validate $xml]
    }
    s delete
    set result
} {1 1 1 0 1 1 0 0}

test schema-15.1 {constraint cmd tcl} {
    tdom::schema s
    s define {
        defelement a {
            tcl append ::schema-15.1
            element b

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