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annotate tokenise.xsl @ 38:468a6cf8bf0b

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big change wrt formulae compiles, crashes
author Henry S. Thompson <ht@markup.co.uk>
date Tue, 25 Apr 2017 22:17:12 +0100
parents ac3cd8de7a10
children 4c6a341e75da
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1 <?xml version='1.0'?>
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2 <!DOCTYPE xsl:stylesheet SYSTEM "../../../lib/xml/xsl.dtd" >
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3 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="3.0" xmlns:s="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:e="http://markup.co.uk/excel" exclude-result-prefixes="xs s e xf" xmlns="http://markup.co.uk/excel" xmlns:xf="http://www.w3.org/2005/xpath-functions">
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4 <xsl:param name="sheet-number"/>
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5 <xsl:param name="xlDir"/>
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6
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7 <xsl:variable name="pat1">("[^"]*")|(\{[^}]+})|(,)|([^=\-+*/();:,.$&lt;>^!]+(?:\.[^=\-+*/();:,.$&lt;>^!]+)*\()|([)])|(^=|\()|((?:(?:'[^']+')|(?:\[[0-9]+\][^!]*)|(?:[a-zA-Z_][a-zA-Z0-9._]*)!))|(\$?[A-Z]+\$?[0-9]+)|([a-zA-Z_\\][a-zA-Z0-9._]*)|(.)</xsl:variable>
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8 <xsl:param name="pat" select="$pat1"/><!-- xsl:param for refinement debugging by passing in the pattern -->
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9
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10 <xsl:variable name="workbook" select="document(concat($xlDir,'/workbook.xml'))/*"/>
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11 <xsl:variable name="sheet-name" select="$workbook/s:sheets/s:sheet[@sheetId=$sheet-number]/@name"/>
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12
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13 <xsl:function name="e:lookup" as="xs:string*">
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14 <xsl:param name="name" as="xs:string" required="yes"/>
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15 <xsl:value-of select="string($workbook/s:definedNames/s:definedName[@name=$name])"/>
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16 </xsl:function>
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17
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18 <xsl:function name="e:tokenise" as="element(*)*">
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19 <!-- Tokenise a formula, recursively wrt variables
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20 Output is composed of e:* as follows:
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21 c: A list (function parameter) separator
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22 e: An external (variable, cell or range) reference
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23 f: A function name followed by an opening parenthesis
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24 l: The beginning of the formula or an opening paren
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25 m: A constant matrix
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26 p: A close-paren
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27 q: A text (delimited by double quotes)
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28 r: A range reference (two children, either e or s or u (unsupported))
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29 s: A single-cell reference
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30 v: A variable name [should only occur inside e]
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31 x: Amalgamated single characters not matched by anything else
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32 -->
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33 <xsl:param name="formula" as="xs:string" required="yes"/>
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34 <!-- The row and column number of the cell whence the formula came -->
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35 <xsl:param name="row" required="yes" as="xs:integer"/>
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36 <xsl:param name="col" required="yes" as="xs:integer"/>
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37 <xsl:sequence select="
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38 let $tokens := analyze-string($formula,$pat)/xf:match/xf:group
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39 return e:tok1($tokens,count($tokens),1,$row,$col,())"/>
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40 </xsl:function>
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41
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42 <xsl:function name="e:tok1" as="element(*)*">
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43 <xsl:param name="tokens" as="element(xf:group)*" required="yes"/>
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44 <xsl:param name="n" required="yes" as="xs:integer"/>
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45 <xsl:param name="i" required="yes" as="xs:integer"/>
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46 <xsl:param name="row" required="yes" as="xs:integer"/>
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47 <xsl:param name="col" required="yes" as="xs:integer"/>
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48 <xsl:param name="soFar" required="yes" as="element(*)*"/>
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49 <xsl:sequence select="
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50 if ($i gt $n)
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51 then $soFar
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52 else
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53 let $next := e:expand($tokens,$i,true(),$row,$col),
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54 $j := $next?1,
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55 $res := $next?2 return
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56 e:tok1($tokens,$n,$j,$row,$col,($soFar,$res))"/>
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57 </xsl:function>
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58
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59 <xsl:function name="e:expand" as="array(*)">
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60 <xsl:param name="tokens" required="yes" as="element(xf:group)*"/>
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61 <xsl:param name="i" required="yes" as="xs:integer"/>
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62 <xsl:param name="local" required="yes" as="xs:boolean"/>
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63 <xsl:param name="row" required="yes" as="xs:integer"/>
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64 <xsl:param name="col" required="yes" as="xs:integer"/>
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65 <xsl:sequence select="
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66 let $t := $tokens[$i],
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67 $r := $tokens[$i + 1] return
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68 if ($t/@nr=1) then e:exp1($i,'q',string($t))
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69 else if ($t/@nr=2) then e:exp1($i,'m',string($t))
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70 else if ($t/@nr=3) then e:exp1($i,'c',',')
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71 else if ($t/@nr=4) then e:exp1($i,'f',string($t))
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72 else if ($t/@nr=5) then e:exp1($i,'p',')')
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73 else if ($t/@nr=6) then e:exp1($i,'l',string($t))
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74 else if ($t/@nr=7)
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75 then if (substring-before($t,'!')=('[0]',$sheet-name))
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76 then (: it's a local reference after all :)
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77 e:expand($tokens,$i+1,true(),$row,$col)
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78 else let $ext := e:expand($tokens,$i+1,false(),$row,$col) return
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79 [$ext?1,e:external($ext?2)]
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80 else if ($t/@nr=10) then e:amalgamate($tokens,$i+1,string($t))
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81 else if ($r[@nr=10 and .=':'])
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82 then (: a range, takes priority :)
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83 [$i+2,e:range($tokens,$i,$local,$row,$col)]
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84 else if ($t/@nr=8) then [$i+1,e:single(string($t),$row,$col)]
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85 else if ($t/@nr=9)
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86 then if ($local)
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87 then let $sub := e:tokenise(e:lookup(string($t)),$row,$col) return
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88 [$i+1,$sub]
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89 else (: can't expand :) e:exp1($i,'v',string($t))
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90 else (: shouldn't ever get here :) ()"/>
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91 </xsl:function>
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92
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93 <xsl:function name="e:amalgamate" as="array(*)">
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94 <xsl:param name="tokens" as="element(xf:group)*"/>
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95 <xsl:param name="i" as="xs:integer"/>
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96 <xsl:param name="soFar" as="xs:string"/>
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97 <xsl:sequence select="if ($tokens[i]/@nr=10)
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98 then e:amalgamate($tokens,$i+1,concat($soFar,
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99 string($tokens[$i])))
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100 else [$i,$soFar]"/>
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101 </xsl:function>
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102
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103 <xsl:function name="e:exp1" as="array(*)">
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104 <xsl:param name="i" as="xs:integer"/>
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105 <xsl:param name="name" as="xs:string"/>
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106 <xsl:param name="val" as="xs:string"/>
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107 <xsl:variable name="elt">
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108 <xsl:element name="{$name}" namespace="http://markup.co.uk/excel">
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109 <xsl:value-of select="$val"/>
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110 </xsl:element>
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111 </xsl:variable>
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112 <xsl:sequence select="[$i+1,$elt]"/>
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113 </xsl:function>
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114
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115 <xsl:function name="e:single" as="element(e:s)">
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116 <!-- I'm _guessing_ that external doesn't matter, i.e. that you
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117 can copy an external relative ref and have it change -->
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118 <xsl:param name="val" as="xs:string"/>
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119 <xsl:param name="row" as="xs:integer"/>
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120 <xsl:param name="col" as="xs:integer"/>
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121 <xsl:sequence select="e:cr($val,$row,$col)"/>
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122 </xsl:function>
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123
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124 <xsl:function name="e:range" as="element(e:r)">
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125 <xsl:param name="tokens" as="element(xf:group)*"/>
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126 <xsl:param name="i" as="xs:integer"/>
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127 <xsl:param name="local" as="xs:boolean"/>
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128 <xsl:param name="row" as="xs:integer"/>
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129 <xsl:param name="col" as="xs:integer"/>
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130 <xsl:variable name="l" select="$tokens[$i]"/>
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131 <xsl:variable name="r" select="$tokens[$i+2]"/>
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132 <xsl:variable name="lv" select="e:rPart($l,$local,$row,$col)"/>
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133 <xsl:variable name="rv" select="e:rPart($r,$local,$row,$col)"/>
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134 <r>
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135 <xsl:copy-of select="($lv,$rv)"/>
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136 </r>
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137 </xsl:function>
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138
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139 <xsl:function name="e:rPart" as="element(*)">
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140 <xsl:param name="g" as="element(xf:group)"/>
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141 <xsl:param name="local" as="xs:boolean"/>
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142 <xsl:param name="row" as="xs:integer"/>
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143 <xsl:param name="col" as="xs:integer"/>
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144 <xsl:sequence select="
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145 if ($g/@nr=8) then e:single(string($g),$row,$col)
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146 else if ($g/@nr=9)
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147 then if ($local)
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148 then let $tokens := e:tokenise(e:lookup(string($g)),
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149 $row,$col) return
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150 if (count($tokens)=1 and
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151 $tokens[local-name()='s' or
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152 (local-name()='e' and $tokens/e:s)])
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153 then $tokens
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154 else e:badRP(string($g),$g/@nr,$local,$row,$col,$tokens)
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155 else e:var(string($g))
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156 else e:badRP(string($g),$g/@nr,$local,$row,$col,())"/>
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157 </xsl:function>
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158
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159 <xsl:function name="e:var" as="element(e:v)">
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160 <xsl:param name="name" as="xs:string"/>
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161 <v><xsl:value-of select="$name"/></v>
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162 </xsl:function>
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163 <xsl:function name="e:badRP" as="element(e:u)">
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164 <xsl:param name="s" as="xs:string"/>
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165 <xsl:param name="t" as="xs:integer"/>
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166 <xsl:param name="local" as="xs:boolean"/>
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167 <xsl:param name="row" as="xs:integer"/>
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168 <xsl:param name="col" as="xs:integer"/>
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169 <xsl:param name="toks" as="element(*)*"/>
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170 <xsl:message terminate="yes">Bad range part in <xsl:value-of select="concat(e:n2a($col),$row)"/>: <xsl:value-of select="$s"/> of type <xsl:value-of select="$t"/> (<xsl:value-of select="if ($local) then 'local' else 'external'"/>: (<xsl:value-of select="string-join($toks,',')"/>)</xsl:message>
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171 <u r="{concat(e:n2a($col),$row)}" s="{$s}" t="{$t}" local="{$local}">
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172 <xsl:value-of select="string-join($toks,',')"/>
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173 </u>
37
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174 </xsl:function>
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175
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176 <xsl:function name="e:external" as="element(e:e)">
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177 <xsl:param name="ref" as="element(*)" required="yes"/>
38
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178 <e><xsl:sequence select="$ref"/></e>
37
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179 </xsl:function>
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180 </xsl:stylesheet>