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166  <div class="section" id="process-profiles-registry">
167<span id="process-profiles"></span><h1>Process profiles registry<a class="headerlink" href="#process-profiles-registry" title="Permalink to this headline"></a></h1>
168<p>WPS Services belonging to the same Services provider often share the
169same inputs and outputs. In such a case, every <a class="reference internal" href="zcfg-reference.html#services-zcfg"><span>ZCFG</span></a> file would contain the same metadata information and
170this may be a waste of time to write them all.</p>
171<p><a class="reference internal" href="../kernel/index.html#kernel-index"><span>ZOO-Kernel</span></a> is able to handle metadata inheritance from <a class="reference external" href="http://www.zoo-project.org/trac/changeset/607">rev. 607</a>, and this solves the issue of writing many ZCFG with same input and output. A registry can be loaded (before any other ZCFG files) and contain a set of Process Profiles organized in hierarchic levels according to the following rules:</p>
172<blockquote>
173<div><ul class="simple">
174<li><em>Concept</em>: The higher level in the hierarchy. <em>Concepts</em> are basic text files containing an abstract description of a WPS Service.</li>
175<li><em>Generic</em>: A <em>Generic</em> profile can make reference to <em>Concepts</em>. It defines inputs and outputs without data format or maximum size limitation.</li>
176<li><em>Implementation</em>: An <em>Implementation</em> profile can inherit from a
177generic profile and make reference to concepts. It contains all
178the metadata information about a particular WPS Service (see
179<a class="reference internal" href="zcfg-reference.html#services-zcfg"><span>ZCFG reference</span></a> for more information).</li>
180</ul>
181</div></blockquote>
182<p>Both <em>Generic</em> and <em>Implementation</em> process profiles are created  from <a class="reference internal" href="zcfg-reference.html#services-zcfg"><span>ZCFG</span></a> files and stored in the registry sub-directories
183according to their level (<em>Concept</em>, <em>Generic</em> or <em>Implementation</em>).</p>
184<p>To activate the registry, you have to add a <code class="docutils literal"><span class="pre">registry</span></code> key to the
185<code class="docutils literal"><span class="pre">[main]</span></code> section of your <code class="docutils literal"><span class="pre">main.cfg</span></code> file, and set its value to the
186directory path used to store the profile ZCFG files.</p>
187<div class="section" id="generic-process-profile">
188<h2>Generic Process Profile<a class="headerlink" href="#generic-process-profile" title="Permalink to this headline"></a></h2>
189<p>A Generic Process Profile is a ZCFG file located in the <code class="docutils literal"><span class="pre">generic</span></code>
190sub-directory, it defines <a class="reference external" href="zcfg-reference.html#main-metadata-information">main metadata information</a>, inputs and outputs
191name, basic metadata and multiplicity. It can make reference to a
192concept by defining a <code class="docutils literal"><span class="pre">concept</span></code> key in the <a class="reference external" href="zcfg-reference.html#main-metadata-information">main metadata
193information</a> part.</p>
194<p>You can find below the <cite>GO.zcfg</cite> file, a typical Generic Process
195Profile for Generic Geographic Operation, taking one InputPolygon
196input parameter and returning a result named Result, it make reference
197to the <code class="docutils literal"><span class="pre">GOC</span></code> concept:</p>
198<div class="highlight-none"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
199 2
200 3
201 4
202 5
203 6
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21518
21619</pre></div></td><td class="code"><div class="highlight"><pre>[GO]
217 Title = Geographic Operation
218 Abstract = Geographic Operation on exactly one input, returning one output
219 concept = GOC
220 level = generic
221 statusSupported = true
222 storeSupported = true
223 &lt;DataInputs&gt;
224  [InputPolygon]
225   Title = the geographic data
226   Abstract = the geographic data to run geographipc operation
227   minOccurs = 1
228   maxOccurs = 1
229 &lt;/DataInputs&gt;
230 &lt;DataOutputs&gt;
231  [Result]
232   Title = the resulting data
233   Abstract = the resulting data after processing the operation
234 &lt;/DataOutputs&gt;
235</pre></div>
236</td></tr></table></div>
237<div class="admonition note">
238<p class="first admonition-title">Note</p>
239<p class="last">if you need to reference more than one concept, you should
240separate their names with a comma (ie. concept = GO,GB),</p>
241</div>
242</div>
243<div class="section" id="process-implementation-profile">
244<h2>Process Implementation Profile<a class="headerlink" href="#process-implementation-profile" title="Permalink to this headline"></a></h2>
245<p>A Process Implementation Profile is similar to a <a class="reference external" href="zcfg-reference.html">ZCFG file</a> located in the <cite>implementation</cite>
246sub-directory, it defines (or inherit from its parent) all the
247properties of a <a class="reference external" href="#generic-process-profile">Generic Process Profile</a>
248and specify <a class="reference external" href="zcfg-reference.html#type-of-data-nodes">Data Format</a>
249for both inputs and outputs. It can make reference to a concept by
250defining a <code class="docutils literal"><span class="pre">concept</span></code> key in the <a class="reference external" href="zcfg-reference.html#main-metadata-information">main metadata information</a> part.</p>
251<p>You can find below the <cite>VectorOperation.zcfg</cite> file, a typical Process
252Implementation Profile for Vector Geographic Operation, it inherit
253from the <a class="reference external" href="#generic-process-profile">GP generic profile</a>:</p>
254<div class="highlight-none"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
255 2
256 3
257 4
258 5
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29138</pre></div></td><td class="code"><div class="highlight"><pre>[VectorOperation]
292 Title = Vector Geographic Operation
293 Abstract = Apply a Vector Geographic Operation on a features collection and return the resulting features collection
294 extend = GO
295 level = profile
296 &lt;DataInputs&gt;
297  [InputPolygon]
298   Title = the vector data
299   Abstract = the vector data to run geographic operation
300   &lt;ComplexData&gt;
301    &lt;Default&gt;
302     mimeType = text/xml
303     encoding = UTF-8
304     schema = http://fooa/gml/3.1.0/polygon.xsd
305    &lt;/Default&gt;
306    &lt;Supported&gt;
307     mimeType = application/json
308     encoding = UTF-8
309     extension = js
310    &lt;/Supported&gt;
311 &lt;/DataInputs&gt;
312 &lt;DataOutputs&gt;
313  [Result]
314   Title = the resulting data
315   Abstract = the resulting geographic data after processing the operation
316   &lt;ComplexData&gt;
317    &lt;Default&gt;
318     mimeType = text/xml
319     encoding = UTF-8
320     schema = http://fooa/gml/3.1.0/polygon.xsd
321    &lt;/Default&gt;
322    &lt;Supported&gt;
323     mimeType = application/json
324     encoding = UTF-8
325     extension = js
326    &lt;/Supported&gt;
327   &lt;/ComplexData&gt;
328 &lt;/DataOutputs&gt;
329</pre></div>
330</td></tr></table></div>
331</div>
332<div class="section" id="zcfg-inheritance">
333<h2>ZCFG inheritance<a class="headerlink" href="#zcfg-inheritance" title="Permalink to this headline"></a></h2>
334<p>For the ZCFG files at the service level, you can inherit the metadata
335from a Process Implementation Profile available in the registry. As
336before, you simply need to add a <code class="docutils literal"><span class="pre">extend</span></code> key refering the ZCFG you
337want to inherit from and a <code class="docutils literal"><span class="pre">level</span></code> key taking the <cite>ìmplementation`</cite>
338value to your main metadata informations.</p>
339<p>So, for example, the original <a class="reference external" href="http://www.zoo-project.org/trac/browser/trunk/zoo-project/zoo-services/ogr/base-vect-ops/cgi-env/ConvexHull.zcfg?rev=491">ConvexHull.zcfg</a>
340may be rewritten as:</p>
341<div class="highlight-none"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre>1
3422
3433
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3455
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3477</pre></div></td><td class="code"><div class="highlight"><pre>[ConvexHull]
348 Title = Compute convex hull.
349 Abstract = Return a feature collection that represents the convex hull of each geometry from the input collection.
350 serviceProvider = ogr_service.zo
351 serviceType = C
352 extend = VectorOperation
353 level = implementation
354</pre></div>
355</td></tr></table></div>
356<p>Now, suppose that your service is able to return the result in KML
357format, then you may write the following:</p>
358<div class="highlight-none"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
359 2
360 3
361 4
362 5
363 6
364 7
365 8
366 9
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37114</pre></div></td><td class="code"><div class="highlight"><pre>[ConvexHull]
372 Title = Compute convex hull.
373 Abstract = Return a feature collection that represents the convex hull of each geometry from the input collection.
374 serviceProvider = ogr_service.zo
375 serviceType = C
376 extend = VectorOperation
377 level = implementation
378 &lt;DataOutputs&gt;
379  [Result]
380     &lt;Supported&gt;
381      mimeType = application/vnd.google-earth.kml+xml
382      encoding = utf-8
383     &lt;/Supported&gt;
384 &lt;/DataOutputs&gt;
385</pre></div>
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