/[cvs]/nfo/perl/libs/XML/XUpdate/xupdate2xsl.xml
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Contents of /nfo/perl/libs/XML/XUpdate/xupdate2xsl.xml

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Revision 1.5 - (show annotations)
Wed May 7 12:41:17 2003 UTC (21 years ago) by joko
Branch: MAIN
Changes since 1.4: +31 -18 lines
File MIME type: text/xml
+ alpha: 2.9 Variables and Values of Variables

1 <?xml version="1.0" encoding="ISO-8859-1"?>
2
3 <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
4
5 <!--
6
7 xupdate2xsl: Translate XML document from namespace 'xupdate' to 'xsl'.
8
9 Purpose of this XML Stylesheet is to implement a set of templates
10 to translate XUpdate lingo into an intermediate xslt stylesheet
11 which actually performs the update to the original xml document
12 in a second step.
13
14 The required glue code - written in Perl - is available in module
15 XML::XUpdate::XSLT. Please have a look at this in order to write
16 code to use this stylesheet from other language bindings.
17
18 Please have a look at the XUpdate specs and associated resources:
19 Requirements: http://www.xmldb.org/xupdate/xupdate-req.html
20 Working Draft: http://www.xmldb.org/xupdate/xupdate-wd.html
21
22 ChangeLog:
23 2003-04-30: first alpha
24 2003-05-01: works: xupdate:insert-after (elements/attributes)
25 2003-05-06: works: xupdate:insert-before (elements/attributes)
26
27 -->
28
29 <xsl:output method="xml" />
30
31 <!-- 1. This is the passthru logic (copy all untouched nodes). -->
32 <xsl:template name="passthru"><xsl:copy><xsl:apply-templates /></xsl:copy></xsl:template>
33 <!-- activate this -->
34 <xsl:template match="*"><xsl:call-template name="passthru" /></xsl:template>
35 <!-- override some builtin rules: see http://www.w3.org/TR/xslt#built-in-rule -->
36 <xsl:template match="comment()"><xsl:call-template name="passthru" /></xsl:template>
37
38
39 <!-- 2. This is the translation part: XUpdate becomes XSLT -->
40
41 <!-- lib -->
42 <!-- This node "encapsulates" common core infrastructure. -->
43 <xsl:template match="xupdate:modifications">
44
45 <!-- <xsl:template name="identity_template_rule"> -->
46 <xsl:element name="xsl:template">
47 <xsl:attribute name="name">identity_template_rule</xsl:attribute>
48
49 <!-- An "identity template rule" - original version by Mike Kay, Software AG -->
50 <!-- Please visit [http://p2p.wrox.com/archive/xslt/2001-06/98.asp] -->
51 <!-- Translated to "self hosting xsl": Andreas Motl, andreas.motl@ilo.de -->
52 <!-- FIXME: Could this be used to replace passthru-logic at 1. ? -->
53 <xsl:element name="xsl:copy">
54 <xsl:element name="xsl:copy-of">
55 <xsl:attribute name="select">@*</xsl:attribute>
56 </xsl:element>
57 <xsl:element name="xsl:apply-templates" />
58 </xsl:element>
59
60 </xsl:element>
61 <!-- </xsl:template> -->
62
63 <!--
64 1. Note: Former custom passthru logic (copy all untouched nodes)
65 now completely replaced by Mike Kay's "identity template rule".
66 What is left here is just the required overriding of some builtin rules
67 to (e.g.) not to loose comments.
68 -->
69 <xsl:comment> 1. override built-in rules </xsl:comment>
70 <!-- override some builtin rules: see http://www.w3.org/TR/xslt#built-in-rule -->
71 <xsl:element name="xsl:template"><xsl:attribute name="match">comment()</xsl:attribute>
72 <xsl:element name="xsl:call-template">
73 <xsl:attribute name="name">identity_template_rule</xsl:attribute>
74 </xsl:element>
75 </xsl:element>
76
77 <!-- continue with all inline nodes -->
78 <xsl:apply-templates />
79
80 </xsl:template>
81
82
83
84
85
86 <!-- code -->
87 <!-- This node "encapsulates" infrastructure for handling the directives. -->
88
89 <!-- Dispatch all "XUpdate Services" here. -->
90 <!-- FIXME: Actually implement action = "CREATE|RETRIEVE|UPDATE|DELETE"!!! -->
91 <xsl:template match="xupdate:insert-after">
92 <!-- <xsl:variable name="select" select="@select">Hello World!</xsl:variable> -->
93 <xsl:call-template name="findcontext">
94 <xsl:with-param name="service">Insert</xsl:with-param>
95 <xsl:with-param name="position">after</xsl:with-param>
96 </xsl:call-template>
97 </xsl:template>
98
99 <xsl:template match="xupdate:insert-before">
100 <xsl:call-template name="findcontext">
101 <xsl:with-param name="service">Insert</xsl:with-param>
102 <xsl:with-param name="position">before</xsl:with-param>
103 </xsl:call-template>
104 </xsl:template>
105
106 <xsl:template match="xupdate:append">
107 <xsl:call-template name="findcontext">
108 <xsl:with-param name="service">Append</xsl:with-param>
109 <!-- <xsl:with-param name="position">inline</xsl:with-param> -->
110 <xsl:with-param name="test">.</xsl:with-param>
111 </xsl:call-template>
112 </xsl:template>
113
114 <xsl:template match="xupdate:update">
115 <xsl:call-template name="findcontext">
116 <xsl:with-param name="service">Update</xsl:with-param>
117 <!-- <xsl:with-param name="position">after</xsl:with-param> -->
118 <xsl:with-param name="test">.</xsl:with-param>
119 </xsl:call-template>
120 </xsl:template>
121
122 <xsl:template match="xupdate:remove">
123 <xsl:call-template name="findcontext">
124 <xsl:with-param name="service">Remove</xsl:with-param>
125 <!-- <xsl:with-param name="position">after</xsl:with-param> -->
126 <xsl:with-param name="test">.</xsl:with-param>
127 </xsl:call-template>
128 </xsl:template>
129
130 <xsl:template match="xupdate:rename">
131 <xsl:call-template name="findcontext">
132 <xsl:with-param name="service">Rename</xsl:with-param>
133 <!-- <xsl:with-param name="position">after</xsl:with-param> -->
134 <xsl:with-param name="test">.</xsl:with-param>
135 </xsl:call-template>
136 </xsl:template>
137
138
139
140 <xsl:template name="findcontext">
141
142 <xsl:comment> 2. context finder </xsl:comment>
143
144 <!-- new of 2003-05-06: introducing parameters here to handle all cases -->
145 <xsl:param name="service" />
146 <xsl:param name="position" />
147 <!-- new of 2003-05-07: replacement for test if undef -->
148 <xsl:param name="test" />
149
150 <!--
151 <xsl:comment>
152 service: <xsl:value-of select="$service" />
153 position: <xsl:value-of select="$position" />
154 test: <xsl:value-of select="$test" />
155 </xsl:comment>
156 -->
157
158 <!-- this resembles some parts of the CRUD API - retranslated to self-hosting xsl -->
159
160 <!-- V1 -->
161 <!-- <xsl:element name="xsl:template"> -->
162 <!-- <xsl:attribute name="match"><xsl:value-of select="@select" /></xsl:attribute> -->
163
164 <!-- fallback -->
165 <xsl:element name="xsl:template">
166 <xsl:attribute name="match">*</xsl:attribute>
167 <xsl:element name="xsl:call-template">
168 <xsl:attribute name="name">identity_template_rule</xsl:attribute>
169 <!-- <xsl:attribute name="name">passthru</xsl:attribute> -->
170 </xsl:element>
171 </xsl:element>
172
173 <!-- V2 -->
174 <xsl:element name="xsl:template">
175 <!-- <xsl:attribute name="match">/addresses/address</xsl:attribute> -->
176 <!-- <xsl:attribute name="match">*</xsl:attribute> -->
177 <xsl:attribute name="match"><xsl:value-of select="@select" /></xsl:attribute>
178
179 <xsl:element name="xsl:choose">
180 <!-- <xsl:attribute name="match"><xsl:value-of select="@select" /></xsl:attribute> -->
181 <xsl:element name="xsl:when">
182 <!-- <xsl:attribute name="test"><xsl:value-of select="@select" /></xsl:attribute> -->
183 <xsl:attribute name="test"><xsl:value-of select="@test" /><xsl:value-of select="$test" /></xsl:attribute>
184
185 <xsl:choose>
186 <xsl:when test="{$service}=Insert">
187
188 <xsl:comment> 2.a. Insert </xsl:comment>
189
190 <!-- Implementation of "xupdate:insert-before" -->
191 <xsl:choose>
192 <xsl:when test="{$position}=before">
193 <xsl:apply-templates />
194 </xsl:when>
195 </xsl:choose>
196
197 <!-- call the "identity template rule" to passthru all childnodes -->
198 <xsl:element name="xsl:call-template">
199 <xsl:attribute name="name">identity_template_rule</xsl:attribute>
200 <!-- <xsl:attribute name="name">passthru</xsl:attribute> -->
201 </xsl:element>
202
203 <!-- Implementation of "xupdate:insert-after" -->
204 <xsl:choose>
205 <xsl:when test="{$position}=after">
206 <xsl:apply-templates />
207 </xsl:when>
208 </xsl:choose>
209
210 </xsl:when>
211
212 <!-- Implementation of "xupdate:append" -->
213 <xsl:when test="{$service}=Append">
214 <xsl:comment> 2.b. Append </xsl:comment>
215 <!-- V1 -->
216 <!-- <xsl:apply-templates /> -->
217 <!-- V2 -->
218 <xsl:element name="xsl:copy">
219 <!--
220 <xsl:element name="xsl:copy-of">
221 <xsl:attribute name="select">@*</xsl:attribute>
222 </xsl:element>
223 -->
224 <!-- Keep content ... -->
225 <xsl:element name="xsl:apply-templates" />
226 <!-- Append this: -->
227 <xsl:apply-templates />
228 </xsl:element>
229 </xsl:when>
230
231 <!-- Implementation of "xupdate:update" -->
232 <xsl:when test="{$service}=Update">
233 <xsl:comment> 2.c. Update </xsl:comment>
234 <!-- V1 -->
235 <!-- <xsl:apply-templates /> -->
236 <!-- V2 -->
237 <xsl:element name="xsl:copy">
238 <!--
239 <xsl:element name="xsl:copy-of">
240 <xsl:attribute name="select">@*</xsl:attribute>
241 </xsl:element>
242 -->
243 <!-- Keep content ... -->
244 <!-- <xsl:element name="xsl:apply-templates" /> -->
245 <!-- Add (replace through) this: -->
246 <xsl:apply-templates />
247 </xsl:element>
248 </xsl:when>
249
250 <!-- Implementation of "xupdate:remove" -->
251 <xsl:when test="{$service}=Remove">
252 <xsl:comment> 2.d. Remove </xsl:comment>
253 </xsl:when>
254
255 <!-- Implementation of "xupdate:rename" -->
256 <xsl:when test="{$service}=Rename">
257 <xsl:comment> 2.e. Rename (Remove context and Append modified identity template) </xsl:comment>
258
259 <xsl:comment> [5.a.] modify node name </xsl:comment>
260 <xsl:element name="xsl:element">
261 <!-- this renames the node (change the "name"-attribute) -->
262 <xsl:attribute name="name">
263 <xsl:apply-templates />
264 </xsl:attribute>
265 <!-- this propagates the original content -->
266 <xsl:element name="xsl:apply-templates" />
267 </xsl:element>
268
269 </xsl:when>
270
271 </xsl:choose>
272
273 </xsl:element>
274 <xsl:element name="xsl:otherwise">
275
276 <!-- call the "identity template rule" to passthru all childnodes -->
277 <xsl:element name="xsl:call-template">
278 <xsl:attribute name="name">identity_template_rule</xsl:attribute>
279 <!-- <xsl:attribute name="name">passthru</xsl:attribute> -->
280 </xsl:element>
281
282 <!-- <xsl:apply-templates /> -->
283 </xsl:element>
284
285 </xsl:element>
286 </xsl:element>
287
288 <!-- <xsl:apply-templates /> -->
289
290 </xsl:template>
291
292
293 <!--
294 Rewrite XUpdate elements to XSLT elements.
295 These templates pass through all attributes
296 and childnodes rewriting the tagname only.
297 FIXME: The redundant encoding for each XUpdate
298 element type seems dummy. Could this be stripped
299 shorter somehow sometimes?
300 -->
301
302 <xsl:template match="xupdate:element">
303 <xsl:comment> 3.a. vivify generic node </xsl:comment>
304 <xsl:element name="xsl:element">
305 <xsl:copy-of select="@*"/>
306 <xsl:apply-templates />
307 </xsl:element>
308 </xsl:template>
309
310 <xsl:template match="xupdate:attribute">
311 <xsl:comment> 3.b. vivify node attributes </xsl:comment>
312 <xsl:element name="xsl:attribute">
313 <xsl:copy-of select="@*"/>
314 <xsl:apply-templates />
315 </xsl:element>
316 </xsl:template>
317
318 <xsl:template match="xupdate:text">
319 <xsl:comment> 4.a. vivify text node </xsl:comment>
320 <xsl:element name="xsl:text">
321 <xsl:copy-of select="@*"/>
322 <xsl:apply-templates />
323 </xsl:element>
324 </xsl:template>
325
326 <xsl:template match="xupdate:processing-instruction">
327 <xsl:comment> 4.b. vivify PI node </xsl:comment>
328 <xsl:element name="xsl:processing-instruction">
329 <xsl:copy-of select="@*"/>
330 <xsl:apply-templates />
331 </xsl:element>
332 </xsl:template>
333
334 <xsl:template match="xupdate:comment">
335 <xsl:comment> 4.c. vivify comment node </xsl:comment>
336 <xsl:element name="xsl:comment">
337 <xsl:copy-of select="@*"/>
338 <xsl:apply-templates />
339 </xsl:element>
340 </xsl:template>
341
342 <!--
343 xsl for [2.9 Variables and Values of Variables]
344 Encapsulates block payload into a named template.
345 -->
346 <xsl:template match="xupdate:variable">
347 <xsl:comment> 5.a. vivify xsl-element "variable" </xsl:comment>
348
349 <xsl:element name="xsl:template">
350 <xsl:attribute name="name">Variables</xsl:attribute>
351
352 <!--
353 <xsl:element name="xsl:variable">
354 <xsl:attribute name="name"><xsl:value-of select="@name" /></xsl:attribute>
355 -->
356
357 <xsl:element name="xsl:apply-templates">
358 <xsl:attribute name="select"><xsl:value-of select="@select" /></xsl:attribute>
359 </xsl:element>
360
361 <!-- <xsl:value-of select="@select" /> -->
362 <xsl:value-of select="." />
363 <!--
364 </xsl:element>
365 -->
366
367 </xsl:element>
368
369 </xsl:template>
370
371 <xsl:template match="xupdate:value-of">
372 <xsl:comment> 5.b. vivify xsl-element "value-of" </xsl:comment>
373 <xsl:element name="xsl:call-template">
374 <xsl:attribute name="name">Variables</xsl:attribute>
375 </xsl:element>
376 <xsl:element name="xsl:value-of">
377 <xsl:copy-of select="@*"/>
378 <!-- <xsl:apply-templates /> -->
379 <!-- this propagates the original content -->
380 <!-- <xsl:element name="xsl:apply-templates"> -->
381 <!-- <xsl:attribute name="" > -->
382 <!-- </xsl:element> -->
383 </xsl:element>
384 </xsl:template>
385
386
387 </xsl:stylesheet>
388

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