hxt-8.0.0: doc/hdoc/src/Text-XML-HXT-Arrow-Pickle-Schema.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<!-- Generated by HsColour, http://www.cs.york.ac.uk/fp/darcs/hscolour/ -->
<title>Haskell Code by HsColour</title>
<link type='text/css' rel='stylesheet' href='hscolour.css' />
</head>
<body>
<pre><a name="line-1"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='comment'>{- |
<a name="line-4"></a> Module : Text.XML.HXT.Arrow.Pickle.Schema
<a name="line-5"></a> Copyright : Copyright (C) 2005 Uwe Schmidt
<a name="line-6"></a> License : MIT
<a name="line-7"></a>
<a name="line-8"></a> Maintainer : Uwe Schmidt (uwe@fh-wedel.de)
<a name="line-9"></a> Stability : experimental
<a name="line-10"></a> Portability: portable
<a name="line-11"></a> Version : $Id$
<a name="line-12"></a>
<a name="line-13"></a>Datatypes and functions for building a content model
<a name="line-14"></a>for XML picklers. A schema is part of every pickler
<a name="line-15"></a>and can be used to derive a corrensponding DTD (or Relax NG schema).
<a name="line-16"></a>This schema further enables checking the picklers.
<a name="line-17"></a>
<a name="line-18"></a>-}</span>
<a name="line-19"></a>
<a name="line-20"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-21"></a>
<a name="line-22"></a><span class='keyword'>module</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>Pickle</span><span class='varop'>.</span><span class='conid'>Schema</span>
<a name="line-23"></a><span class='keyword'>where</span>
<a name="line-24"></a>
<a name="line-25"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>DOM</span><span class='varop'>.</span><span class='conid'>TypeDefs</span>
<a name="line-26"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>RelaxNG</span><span class='varop'>.</span><span class='conid'>XmlSchema</span><span class='varop'>.</span><span class='conid'>DataTypeLibW3C</span>
<a name="line-27"></a>
<a name="line-28"></a><span class='keyword'>import</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>List</span>
<a name="line-29"></a> <span class='layout'>(</span> <span class='varid'>sort</span> <span class='layout'>)</span>
<a name="line-30"></a>
<a name="line-31"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-32"></a>
<a name="line-33"></a><span class='comment'>-- | The datatype for modelling the structure of an</span>
<a name="line-34"></a>
<a name="line-35"></a><a name="Schema"></a><span class='keyword'>data</span> <span class='conid'>Schema</span> <span class='keyglyph'>=</span> <span class='conid'>Any</span>
<a name="line-36"></a> <span class='keyglyph'>|</span> <span class='conid'>Seq</span> <span class='layout'>{</span> <span class='varid'>sc_l</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>Schema</span><span class='keyglyph'>]</span>
<a name="line-37"></a> <span class='layout'>}</span>
<a name="line-38"></a> <span class='keyglyph'>|</span> <span class='conid'>Alt</span> <span class='layout'>{</span> <span class='varid'>sc_l</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>Schema</span><span class='keyglyph'>]</span>
<a name="line-39"></a> <span class='layout'>}</span>
<a name="line-40"></a> <span class='keyglyph'>|</span> <span class='conid'>Rep</span> <span class='layout'>{</span> <span class='varid'>sc_lb</span> <span class='keyglyph'>::</span> <span class='conid'>Int</span>
<a name="line-41"></a> <span class='layout'>,</span> <span class='varid'>sc_ub</span> <span class='keyglyph'>::</span> <span class='conid'>Int</span>
<a name="line-42"></a> <span class='layout'>,</span> <span class='varid'>sc_1</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span>
<a name="line-43"></a> <span class='layout'>}</span>
<a name="line-44"></a> <span class='keyglyph'>|</span> <span class='conid'>Element</span> <span class='layout'>{</span> <span class='varid'>sc_n</span> <span class='keyglyph'>::</span> <span class='conid'>Name</span>
<a name="line-45"></a> <span class='layout'>,</span> <span class='varid'>sc_1</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span>
<a name="line-46"></a> <span class='layout'>}</span>
<a name="line-47"></a> <span class='keyglyph'>|</span> <span class='conid'>Attribute</span> <span class='layout'>{</span> <span class='varid'>sc_n</span> <span class='keyglyph'>::</span> <span class='conid'>Name</span>
<a name="line-48"></a> <span class='layout'>,</span> <span class='varid'>sc_1</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span>
<a name="line-49"></a> <span class='layout'>}</span>
<a name="line-50"></a> <span class='keyglyph'>|</span> <span class='conid'>ElemRef</span> <span class='layout'>{</span> <span class='varid'>sc_n</span> <span class='keyglyph'>::</span> <span class='conid'>Name</span>
<a name="line-51"></a> <span class='layout'>}</span>
<a name="line-52"></a> <span class='keyglyph'>|</span> <span class='conid'>CharData</span> <span class='layout'>{</span> <span class='varid'>sc_dt</span> <span class='keyglyph'>::</span> <span class='conid'>DataTypeDescr</span>
<a name="line-53"></a> <span class='layout'>}</span>
<a name="line-54"></a> <span class='keyword'>deriving</span> <span class='layout'>(</span><span class='conid'>Eq</span><span class='layout'>,</span> <span class='conid'>Show</span><span class='layout'>)</span>
<a name="line-55"></a>
<a name="line-56"></a><a name="Name"></a><span class='keyword'>type</span> <span class='conid'>Name</span> <span class='keyglyph'>=</span> <span class='conid'>String</span>
<a name="line-57"></a><a name="Schemas"></a><span class='keyword'>type</span> <span class='conid'>Schemas</span> <span class='keyglyph'>=</span> <span class='keyglyph'>[</span><span class='conid'>Schema</span><span class='keyglyph'>]</span>
<a name="line-58"></a>
<a name="line-59"></a><a name="DataTypeDescr"></a><span class='keyword'>data</span> <span class='conid'>DataTypeDescr</span> <span class='keyglyph'>=</span> <span class='conid'>DTDescr</span> <span class='layout'>{</span> <span class='varid'>dtLib</span> <span class='keyglyph'>::</span> <span class='conid'>String</span>
<a name="line-60"></a> <span class='layout'>,</span> <span class='varid'>dtName</span> <span class='keyglyph'>::</span> <span class='conid'>String</span>
<a name="line-61"></a> <span class='layout'>,</span> <span class='varid'>dtParams</span> <span class='keyglyph'>::</span> <span class='conid'>Attributes</span>
<a name="line-62"></a> <span class='layout'>}</span>
<a name="line-63"></a> <span class='keyword'>deriving</span> <span class='layout'>(</span><span class='conid'>Show</span><span class='layout'>)</span>
<a name="line-64"></a>
<a name="line-65"></a><span class='keyword'>instance</span> <span class='conid'>Eq</span> <span class='conid'>DataTypeDescr</span> <span class='keyword'>where</span>
<a name="line-66"></a> <span class='varid'>x1</span> <span class='varop'>==</span> <span class='varid'>x2</span> <span class='keyglyph'>=</span> <span class='varid'>dtLib</span> <span class='varid'>x1</span> <span class='varop'>==</span> <span class='varid'>dtLib</span> <span class='varid'>x2</span>
<a name="line-67"></a> <span class='varop'>&&</span>
<a name="line-68"></a> <span class='varid'>dtName</span> <span class='varid'>x1</span> <span class='varop'>==</span> <span class='varid'>dtName</span> <span class='varid'>x2</span>
<a name="line-69"></a> <span class='varop'>&&</span>
<a name="line-70"></a> <span class='varid'>sort</span> <span class='layout'>(</span><span class='varid'>dtParams</span> <span class='varid'>x1</span><span class='layout'>)</span> <span class='varop'>==</span> <span class='varid'>sort</span> <span class='layout'>(</span><span class='varid'>dtParams</span> <span class='varid'>x2</span><span class='layout'>)</span>
<a name="line-71"></a>
<a name="line-72"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-73"></a>
<a name="line-74"></a><span class='comment'>-- | test: is schema a simple XML Schema datatype</span>
<a name="line-75"></a>
<a name="line-76"></a><a name="isScXsd"></a><span class='definition'>isScXsd</span> <span class='keyglyph'>::</span> <span class='layout'>(</span><span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-77"></a>
<a name="line-78"></a><span class='definition'>isScXsd</span> <span class='varid'>p</span> <span class='layout'>(</span><span class='conid'>CharData</span> <span class='layout'>(</span><span class='conid'>DTDescr</span> <span class='varid'>lib</span> <span class='varid'>n</span> <span class='sel'>_ps</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-79"></a> <span class='keyglyph'>=</span> <span class='varid'>lib</span> <span class='varop'>==</span> <span class='varid'>w3cNS</span>
<a name="line-80"></a> <span class='varop'>&&</span>
<a name="line-81"></a> <span class='varid'>p</span> <span class='varid'>n</span>
<a name="line-82"></a><span class='definition'>isScXsd</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>False</span>
<a name="line-83"></a>
<a name="line-84"></a><span class='comment'>-- | test: is type a fixed value attribute type</span>
<a name="line-85"></a>
<a name="line-86"></a><a name="isScFixed"></a><span class='definition'>isScFixed</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-87"></a><span class='definition'>isScFixed</span> <span class='varid'>sc</span> <span class='keyglyph'>=</span> <span class='varid'>isScXsd</span> <span class='layout'>(</span><span class='varop'>==</span> <span class='varid'>xsd_string</span><span class='layout'>)</span> <span class='varid'>sc</span>
<a name="line-88"></a> <span class='varop'>&&</span>
<a name="line-89"></a> <span class='layout'>(</span><span class='layout'>(</span><span class='varop'>==</span> <span class='num'>1</span><span class='layout'>)</span> <span class='varop'>.</span> <span class='varid'>length</span> <span class='varop'>.</span> <span class='varid'>words</span> <span class='varop'>.</span> <span class='varid'>xsdParam</span> <span class='varid'>xsd_enumeration</span><span class='layout'>)</span> <span class='varid'>sc</span>
<a name="line-90"></a>
<a name="line-91"></a><a name="isScEnum"></a><span class='definition'>isScEnum</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-92"></a><span class='definition'>isScEnum</span> <span class='varid'>sc</span> <span class='keyglyph'>=</span> <span class='varid'>isScXsd</span> <span class='layout'>(</span><span class='varop'>==</span> <span class='varid'>xsd_string</span><span class='layout'>)</span> <span class='varid'>sc</span>
<a name="line-93"></a> <span class='varop'>&&</span>
<a name="line-94"></a> <span class='layout'>(</span><span class='varid'>not</span> <span class='varop'>.</span> <span class='varid'>null</span> <span class='varop'>.</span> <span class='varid'>xsdParam</span> <span class='varid'>xsd_enumeration</span><span class='layout'>)</span> <span class='varid'>sc</span>
<a name="line-95"></a>
<a name="line-96"></a><a name="isScElem"></a><span class='definition'>isScElem</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-97"></a><span class='definition'>isScElem</span> <span class='layout'>(</span><span class='conid'>Element</span> <span class='keyword'>_</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>True</span>
<a name="line-98"></a><span class='definition'>isScElem</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>False</span>
<a name="line-99"></a>
<a name="line-100"></a><a name="isScAttr"></a><span class='definition'>isScAttr</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-101"></a><span class='definition'>isScAttr</span> <span class='layout'>(</span><span class='conid'>Attribute</span> <span class='keyword'>_</span> <span class='keyword'>_</span><span class='layout'>)</span><span class='keyglyph'>=</span> <span class='conid'>True</span>
<a name="line-102"></a><span class='definition'>isScAttr</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>False</span>
<a name="line-103"></a>
<a name="line-104"></a><a name="isScElemRef"></a><span class='definition'>isScElemRef</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-105"></a><span class='definition'>isScElemRef</span> <span class='layout'>(</span><span class='conid'>ElemRef</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>True</span>
<a name="line-106"></a><span class='definition'>isScElemRef</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>False</span>
<a name="line-107"></a>
<a name="line-108"></a><a name="isScCharData"></a><span class='definition'>isScCharData</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-109"></a><span class='definition'>isScCharData</span> <span class='layout'>(</span><span class='conid'>CharData</span> <span class='keyword'>_</span><span class='layout'>)</span><span class='keyglyph'>=</span> <span class='conid'>True</span>
<a name="line-110"></a><span class='definition'>isScCharData</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>False</span>
<a name="line-111"></a>
<a name="line-112"></a><a name="isScSARE"></a><span class='definition'>isScSARE</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-113"></a><span class='definition'>isScSARE</span> <span class='layout'>(</span><span class='conid'>Seq</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>True</span>
<a name="line-114"></a><span class='definition'>isScSARE</span> <span class='layout'>(</span><span class='conid'>Alt</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>True</span>
<a name="line-115"></a><span class='definition'>isScSARE</span> <span class='layout'>(</span><span class='conid'>Rep</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>True</span>
<a name="line-116"></a><span class='definition'>isScSARE</span> <span class='layout'>(</span><span class='conid'>ElemRef</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>True</span>
<a name="line-117"></a><span class='definition'>isScSARE</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>False</span>
<a name="line-118"></a>
<a name="line-119"></a><a name="isScList"></a><span class='definition'>isScList</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-120"></a><span class='definition'>isScList</span> <span class='layout'>(</span><span class='conid'>Rep</span> <span class='num'>0</span> <span class='layout'>(</span><span class='comment'>-</span><span class='num'>1</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>True</span>
<a name="line-121"></a><span class='definition'>isScList</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>False</span>
<a name="line-122"></a>
<a name="line-123"></a><a name="isScOpt"></a><span class='definition'>isScOpt</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-124"></a><span class='definition'>isScOpt</span> <span class='layout'>(</span><span class='conid'>Rep</span> <span class='num'>0</span> <span class='num'>1</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>True</span>
<a name="line-125"></a><span class='definition'>isScOpt</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>False</span>
<a name="line-126"></a>
<a name="line-127"></a><span class='comment'>-- | access an attribute of a descr of an atomic type</span>
<a name="line-128"></a>
<a name="line-129"></a><a name="xsdParam"></a><span class='definition'>xsdParam</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-130"></a><span class='definition'>xsdParam</span> <span class='varid'>n</span> <span class='layout'>(</span><span class='conid'>CharData</span> <span class='varid'>dtd</span><span class='layout'>)</span>
<a name="line-131"></a> <span class='keyglyph'>=</span> <span class='varid'>lookup1</span> <span class='varid'>n</span> <span class='layout'>(</span><span class='varid'>dtParams</span> <span class='varid'>dtd</span><span class='layout'>)</span>
<a name="line-132"></a><span class='definition'>xsdParam</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='str'>""</span>
<a name="line-133"></a>
<a name="line-134"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-135"></a>
<a name="line-136"></a><span class='comment'>-- smart constructors for Schema datatype</span>
<a name="line-137"></a>
<a name="line-138"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-139"></a><span class='comment'>--</span>
<a name="line-140"></a><span class='comment'>-- predefined xsd data types for representation of DTD types</span>
<a name="line-141"></a>
<a name="line-142"></a><a name="scDT"></a><span class='definition'>scDT</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span>
<a name="line-143"></a><span class='definition'>scDT</span> <span class='varid'>l</span> <span class='varid'>n</span> <span class='varid'>rl</span> <span class='keyglyph'>=</span> <span class='conid'>CharData</span> <span class='varop'>$</span> <span class='conid'>DTDescr</span> <span class='varid'>l</span> <span class='varid'>n</span> <span class='varid'>rl</span>
<a name="line-144"></a>
<a name="line-145"></a><a name="scDTxsd"></a><span class='definition'>scDTxsd</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>Attributes</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span>
<a name="line-146"></a><span class='definition'>scDTxsd</span> <span class='keyglyph'>=</span> <span class='varid'>scDT</span> <span class='varid'>w3cNS</span>
<a name="line-147"></a>
<a name="line-148"></a><a name="scString"></a><span class='definition'>scString</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span>
<a name="line-149"></a><span class='definition'>scString</span> <span class='keyglyph'>=</span> <span class='varid'>scDTxsd</span> <span class='varid'>xsd_string</span> <span class='conid'>[]</span>
<a name="line-150"></a>
<a name="line-151"></a><a name="scString1"></a><span class='definition'>scString1</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span>
<a name="line-152"></a><span class='definition'>scString1</span> <span class='keyglyph'>=</span> <span class='varid'>scDTxsd</span> <span class='varid'>xsd_string</span> <span class='keyglyph'>[</span><span class='layout'>(</span><span class='varid'>xsd_minLength</span><span class='layout'>,</span> <span class='str'>"1"</span><span class='layout'>)</span><span class='keyglyph'>]</span>
<a name="line-153"></a>
<a name="line-154"></a><a name="scFixed"></a><span class='definition'>scFixed</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span>
<a name="line-155"></a><span class='definition'>scFixed</span> <span class='varid'>v</span> <span class='keyglyph'>=</span> <span class='varid'>scDTxsd</span> <span class='varid'>xsd_string</span> <span class='keyglyph'>[</span><span class='layout'>(</span><span class='varid'>xsd_enumeration</span><span class='layout'>,</span> <span class='varid'>v</span><span class='layout'>)</span><span class='keyglyph'>]</span>
<a name="line-156"></a>
<a name="line-157"></a><a name="scEnum"></a><span class='definition'>scEnum</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span>
<a name="line-158"></a><span class='definition'>scEnum</span> <span class='varid'>vs</span> <span class='keyglyph'>=</span> <span class='varid'>scFixed</span> <span class='layout'>(</span><span class='varid'>unwords</span> <span class='varid'>vs</span><span class='layout'>)</span>
<a name="line-159"></a>
<a name="line-160"></a><a name="scNmtoken"></a><span class='definition'>scNmtoken</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span>
<a name="line-161"></a><span class='definition'>scNmtoken</span> <span class='keyglyph'>=</span> <span class='varid'>scDTxsd</span> <span class='varid'>xsd_NCName</span> <span class='conid'>[]</span>
<a name="line-162"></a>
<a name="line-163"></a><a name="scNmtokens"></a><span class='definition'>scNmtokens</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span>
<a name="line-164"></a><span class='definition'>scNmtokens</span> <span class='keyglyph'>=</span> <span class='varid'>scList</span> <span class='varid'>scNmtoken</span>
<a name="line-165"></a>
<a name="line-166"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-167"></a>
<a name="line-168"></a><a name="scEmpty"></a><span class='definition'>scEmpty</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span>
<a name="line-169"></a><span class='definition'>scEmpty</span> <span class='keyglyph'>=</span> <span class='conid'>Seq</span> <span class='conid'>[]</span>
<a name="line-170"></a>
<a name="line-171"></a><a name="scSeq"></a><span class='definition'>scSeq</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span>
<a name="line-172"></a><span class='definition'>scSeq</span> <span class='layout'>(</span><span class='conid'>Seq</span> <span class='conid'>[]</span><span class='layout'>)</span> <span class='varid'>sc2</span> <span class='keyglyph'>=</span> <span class='varid'>sc2</span>
<a name="line-173"></a><span class='definition'>scSeq</span> <span class='varid'>sc1</span> <span class='layout'>(</span><span class='conid'>Seq</span> <span class='conid'>[]</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>sc1</span>
<a name="line-174"></a><span class='definition'>scSeq</span> <span class='layout'>(</span><span class='conid'>Seq</span> <span class='varid'>scs1</span><span class='layout'>)</span> <span class='layout'>(</span><span class='conid'>Seq</span> <span class='varid'>scs2</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>Seq</span> <span class='layout'>(</span><span class='varid'>scs1</span> <span class='varop'>++</span> <span class='varid'>scs2</span><span class='layout'>)</span> <span class='comment'>-- prevent nested Seq expr</span>
<a name="line-175"></a><span class='definition'>scSeq</span> <span class='layout'>(</span><span class='conid'>Seq</span> <span class='varid'>scs1</span><span class='layout'>)</span> <span class='varid'>sc2</span> <span class='keyglyph'>=</span> <span class='conid'>Seq</span> <span class='layout'>(</span><span class='varid'>scs1</span> <span class='varop'>++</span> <span class='keyglyph'>[</span><span class='varid'>sc2</span><span class='keyglyph'>]</span><span class='layout'>)</span>
<a name="line-176"></a><span class='definition'>scSeq</span> <span class='varid'>sc1</span> <span class='layout'>(</span><span class='conid'>Seq</span> <span class='varid'>scs2</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>Seq</span> <span class='layout'>(</span><span class='varid'>sc1</span> <span class='conop'>:</span> <span class='varid'>scs2</span><span class='layout'>)</span>
<a name="line-177"></a><span class='definition'>scSeq</span> <span class='varid'>sc1</span> <span class='varid'>sc2</span> <span class='keyglyph'>=</span> <span class='conid'>Seq</span> <span class='keyglyph'>[</span><span class='varid'>sc1</span><span class='layout'>,</span><span class='varid'>sc2</span><span class='keyglyph'>]</span>
<a name="line-178"></a>
<a name="line-179"></a><a name="scSeqs"></a><span class='definition'>scSeqs</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>Schema</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span>
<a name="line-180"></a><span class='definition'>scSeqs</span> <span class='keyglyph'>=</span> <span class='varid'>foldl</span> <span class='varid'>scSeq</span> <span class='varid'>scEmpty</span>
<a name="line-181"></a>
<a name="line-182"></a><a name="scNull"></a><span class='definition'>scNull</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span>
<a name="line-183"></a><span class='definition'>scNull</span> <span class='keyglyph'>=</span> <span class='conid'>Alt</span> <span class='conid'>[]</span>
<a name="line-184"></a>
<a name="line-185"></a><a name="scAlt"></a><span class='definition'>scAlt</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span>
<a name="line-186"></a><span class='definition'>scAlt</span> <span class='layout'>(</span><span class='conid'>Alt</span> <span class='conid'>[]</span><span class='layout'>)</span> <span class='varid'>sc2</span> <span class='keyglyph'>=</span> <span class='varid'>sc2</span>
<a name="line-187"></a><span class='definition'>scAlt</span> <span class='varid'>sc1</span> <span class='layout'>(</span><span class='conid'>Alt</span> <span class='conid'>[]</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>sc1</span>
<a name="line-188"></a><span class='definition'>scAlt</span> <span class='layout'>(</span><span class='conid'>Alt</span> <span class='varid'>scs1</span><span class='layout'>)</span> <span class='layout'>(</span><span class='conid'>Alt</span> <span class='varid'>scs2</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>Alt</span> <span class='layout'>(</span><span class='varid'>scs1</span> <span class='varop'>++</span> <span class='varid'>scs2</span><span class='layout'>)</span> <span class='comment'>-- prevent nested Alt expr</span>
<a name="line-189"></a><span class='definition'>scAlt</span> <span class='layout'>(</span><span class='conid'>Alt</span> <span class='varid'>scs1</span><span class='layout'>)</span> <span class='varid'>sc2</span> <span class='keyglyph'>=</span> <span class='conid'>Alt</span> <span class='layout'>(</span><span class='varid'>scs1</span> <span class='varop'>++</span> <span class='keyglyph'>[</span><span class='varid'>sc2</span><span class='keyglyph'>]</span><span class='layout'>)</span>
<a name="line-190"></a><span class='definition'>scAlt</span> <span class='varid'>sc1</span> <span class='layout'>(</span><span class='conid'>Alt</span> <span class='varid'>scs2</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>Alt</span> <span class='layout'>(</span><span class='varid'>sc1</span> <span class='conop'>:</span> <span class='varid'>scs2</span><span class='layout'>)</span>
<a name="line-191"></a><span class='definition'>scAlt</span> <span class='varid'>sc1</span> <span class='varid'>sc2</span> <span class='keyglyph'>=</span> <span class='conid'>Alt</span> <span class='keyglyph'>[</span><span class='varid'>sc1</span><span class='layout'>,</span><span class='varid'>sc2</span><span class='keyglyph'>]</span>
<a name="line-192"></a>
<a name="line-193"></a><a name="scAlts"></a><span class='definition'>scAlts</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>Schema</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span>
<a name="line-194"></a><span class='definition'>scAlts</span> <span class='keyglyph'>=</span> <span class='varid'>foldl</span> <span class='varid'>scAlt</span> <span class='varid'>scNull</span>
<a name="line-195"></a>
<a name="line-196"></a><a name="scOption"></a><span class='definition'>scOption</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span>
<a name="line-197"></a><span class='definition'>scOption</span> <span class='layout'>(</span><span class='conid'>Seq</span> <span class='conid'>[]</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>scEmpty</span>
<a name="line-198"></a><span class='definition'>scOption</span> <span class='layout'>(</span><span class='conid'>Attribute</span> <span class='varid'>n</span> <span class='varid'>sc2</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>Attribute</span> <span class='varid'>n</span> <span class='layout'>(</span><span class='varid'>scOption</span> <span class='varid'>sc2</span><span class='layout'>)</span>
<a name="line-199"></a><span class='definition'>scOption</span> <span class='varid'>sc1</span>
<a name="line-200"></a> <span class='keyglyph'>|</span> <span class='varid'>sc1</span> <span class='varop'>==</span> <span class='varid'>scString1</span> <span class='keyglyph'>=</span> <span class='varid'>scString</span>
<a name="line-201"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='varid'>scOpt</span> <span class='varid'>sc1</span>
<a name="line-202"></a>
<a name="line-203"></a><a name="scList"></a><span class='definition'>scList</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span>
<a name="line-204"></a><span class='definition'>scList</span> <span class='keyglyph'>=</span> <span class='varid'>scRep</span> <span class='num'>0</span> <span class='layout'>(</span><span class='comment'>-</span><span class='num'>1</span><span class='layout'>)</span>
<a name="line-205"></a>
<a name="line-206"></a><a name="scList1"></a><span class='definition'>scList1</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span>
<a name="line-207"></a><span class='definition'>scList1</span> <span class='keyglyph'>=</span> <span class='varid'>scRep</span> <span class='num'>1</span> <span class='layout'>(</span><span class='comment'>-</span><span class='num'>1</span><span class='layout'>)</span>
<a name="line-208"></a>
<a name="line-209"></a><a name="scOpt"></a><span class='definition'>scOpt</span> <span class='keyglyph'>::</span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span>
<a name="line-210"></a><span class='definition'>scOpt</span> <span class='keyglyph'>=</span> <span class='varid'>scRep</span> <span class='num'>0</span> <span class='num'>1</span>
<a name="line-211"></a>
<a name="line-212"></a><a name="scRep"></a><span class='definition'>scRep</span> <span class='keyglyph'>::</span> <span class='conid'>Int</span> <span class='keyglyph'>-></span> <span class='conid'>Int</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span>
<a name="line-213"></a><span class='definition'>scRep</span> <span class='varid'>l</span> <span class='varid'>u</span> <span class='varid'>sc1</span> <span class='keyglyph'>=</span> <span class='conid'>Rep</span> <span class='varid'>l</span> <span class='varid'>u</span> <span class='varid'>sc1</span>
<a name="line-214"></a>
<a name="line-215"></a><a name="scElem"></a><span class='definition'>scElem</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span>
<a name="line-216"></a><span class='definition'>scElem</span> <span class='varid'>n</span> <span class='varid'>sc1</span> <span class='keyglyph'>=</span> <span class='conid'>Element</span> <span class='varid'>n</span> <span class='varid'>sc1</span>
<a name="line-217"></a>
<a name="line-218"></a><a name="scAttr"></a><span class='definition'>scAttr</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span> <span class='keyglyph'>-></span> <span class='conid'>Schema</span>
<a name="line-219"></a><span class='definition'>scAttr</span> <span class='varid'>n</span> <span class='varid'>sc1</span> <span class='keyglyph'>=</span> <span class='conid'>Attribute</span> <span class='varid'>n</span> <span class='varid'>sc1</span>
<a name="line-220"></a>
<a name="line-221"></a><span class='comment'>-- ------------------------------------------------------------</span>
</pre></body>
</html>