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<h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Anatomie des étiquettes osm</span></h1>
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<div id="siteSub" class="noprint">From OpenStreetMap Wiki</div>
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<div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><p>Cette page a pour but de formaliser la structure des <a href="/wiki/FR:Attributs" title="FR:Attributs">tags</a> et de leurs valeurs existantes de façon générale afin de faciliter la création de nouvelles versions de façon cohérente. Elle ne détaille pas <a href="/wiki/FR:Processus_de_proposition" title="FR:Processus de proposition">le processus de proposition de nouveaux tags</a> ou de <a href="/wiki/Map_Icons/Proposed_Icons" class="mw-redirect" title="Map Icons/Proposed Icons">proposition d'icones</a>.
</p>
<div id="toc" class="toc" role="navigation" aria-labelledby="mw-toc-heading"><input type="checkbox" role="button" id="toctogglecheckbox" class="toctogglecheckbox" style="display:none" /><div class="toctitle" lang="en" dir="ltr"><h2 id="mw-toc-heading">Contents</h2><span class="toctogglespan"><label class="toctogglelabel" for="toctogglecheckbox"></label></span></div>
<ul>
<li class="toclevel-1 tocsection-1"><a href="#Principe_de_base"><span class="tocnumber">1</span> <span class="toctext">Principe de base</span></a>
<ul>
<li class="toclevel-2 tocsection-2"><a href="#Sous_types_de_clé_et_de_valeur"><span class="tocnumber">1.1</span> <span class="toctext">Sous types de clé et de valeur</span></a></li>
<li class="toclevel-2 tocsection-3"><a href="#Variations_dans_le_temps"><span class="tocnumber">1.2</span> <span class="toctext">Variations dans le temps</span></a></li>
<li class="toclevel-2 tocsection-4"><a href="#Mises_en_garde_diverses"><span class="tocnumber">1.3</span> <span class="toctext">Mises en garde diverses</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-5"><a href="#Sous_ensemble_linguistique"><span class="tocnumber">2</span> <span class="toctext">Sous ensemble linguistique</span></a>
<ul>
<li class="toclevel-2 tocsection-6"><a href="#Exemples_de_particularités_régionales"><span class="tocnumber">2.1</span> <span class="toctext">Exemples de particularités régionales</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-7"><a href="#Sémantique"><span class="tocnumber">3</span> <span class="toctext">Sémantique</span></a>
<ul>
<li class="toclevel-2 tocsection-8"><a href="#Comment_structurer_des_tags_qui_vont_ensemble"><span class="tocnumber">3.1</span> <span class="toctext">Comment structurer des tags qui vont ensemble</span></a></li>
<li class="toclevel-2 tocsection-9"><a href="#Propositions_pour_relier_la_sémantique"><span class="tocnumber">3.2</span> <span class="toctext">Propositions pour relier la sémantique</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-10"><a href="#évolution_des_tags"><span class="tocnumber">4</span> <span class="toctext">évolution des tags</span></a>
<ul>
<li class="toclevel-2 tocsection-11"><a href="#Problèmes_concernant_l&#39;évolution_des_tags"><span class="tocnumber">4.1</span> <span class="toctext">Problèmes concernant l'évolution des tags</span></a></li>
<li class="toclevel-2 tocsection-12"><a href="#Détermination_de_rendu_visuel_d&#39;un_Tag"><span class="tocnumber">4.2</span> <span class="toctext">Détermination de rendu visuel d'un Tag</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-13"><a href="#éléments_non_tranchés_dans_la_communauté"><span class="tocnumber">5</span> <span class="toctext">éléments non tranchés dans la communauté</span></a></li>
</ul>
</div>
<h2><span class="mw-headline" id="Principe_de_base">Principe de base</span></h2>
<p>Les <i>tags</i> dans OpenStreetMap suivent <b>un principe de clé/valeur</b> avec des nuances particulières.
</p><p>
La signature d'un tag est documentée ainsi:</p><div class="mw-highlight mw-highlight-lang-html mw-content-ltr" dir="ltr"><pre><span></span>clé[:sous-clé[:sous-sous-clé]]=valeur[;autre_valeur[;autre_encore_etc]]
</pre></div><p>Les parties entre crochet sont optionnelles pour qu'un tag soit valide.Nous partons du principe que ce que l'on marque dans OSM doit correspondre à une réalité physique sur le terrain actuellement, et non dans le futur ou dans le passé.
Une <b>clé</b> vaut une <b>valeur</b>, ce qui est symbolisé par deux termes avec un symbole égale entre deux. Par abus de langage on parle de <i>taguer</i> (mettre un <i>tag</i>, une étiquette), pour désigner l'action de qualifier des objets dans OSM.</p><blockquote><p>Exemple:
</p><p><a href="/wiki/FR:Tag:amenity%3Dbicycle_repair_station" title="FR:Tag:amenity=bicycle repair station">amenity=bicycle_repair_station</a>
</p><p><a href="/wiki/FR:Tag:shop%3Dbakery" title="FR:Tag:shop=bakery">shop=bakery</a>
</p><p>
La clé amenity indique ici une station de réparation de vélo, tous les termes sont désignés en anglais par défaut.</p></blockquote>
<h3><span id="Sous_types_de_cl.C3.A9_et_de_valeur"></span><span class="mw-headline" id="Sous_types_de_clé_et_de_valeur">Sous types de clé et de valeur</span></h3>
<p>Il est possible de spécifier des sous-types en détaillant une clé avec des symboles "deux points"
</p><p><a href="/wiki/Key:building:fireproof" title="Key:building:fireproof">Key:building:fireproof</a>
</p><p>Information sur la résistance au feu d'un bâtiment.
</p><p><br />
</p>
<h3><span class="mw-headline" id="Variations_dans_le_temps">Variations dans le temps</span></h3>
<ul><li><a href="/wiki/Key:disused:" class="mw-redirect" title="Key:disused:">disused</a> objets inutilisés tel que des cabines téléphoniques</li>
<li><a href="/wiki/Tag:demolished%3Dyes" title="Tag:demolished=yes">demolished</a> objets démolis, par exemple suite à une catastrophe ou un chantier. ne convient pas aux ruines</li>
<li>closed</li></ul>
<p>Les projets de construction peuvent être marqués par zone, mais il est incorrect de créer à l'avance des bâtiments dans OSM si ceux ci n'ont pas encore commencé à être construits.
</p><p><br />
Il est possible de spécifier des <a href="/wiki/FR:Restrictions_conditionnelles" title="FR:Restrictions conditionnelles">attributs conditionnels</a>
</p><p><br />Exemple:
</p>
<pre><b>maxspeed:conditional=100 @ (20:00-06:00)</b>
</pre>
<p>Les restrictions liés aux modes de transports font généralement abstraction de <b>access:</b>&#160;:
</p>
<pre>&lt;transportation mode&gt;[<b>:</b>&lt;direction&gt;]<b>:conditional</b>
<b>=</b> &lt;restriction-value&gt; <b>@</b> &lt;condition&gt;[<b>;</b>&lt;restriction-value&gt; <b>@</b> &lt;condition&gt;]
</pre>
<h3><span class="mw-headline" id="Mises_en_garde_diverses">Mises en garde diverses</span></h3>
<p><a href="/wiki/FR:Taguer_pour_le_rendu" title="FR:Taguer pour le rendu">On ne tague pas pour le rendu</a>, bien qu'il soit satisfaisant de voir le résultat de sa contribution dans le rendu.
</p><p>
Chaque clé désignant toujours un type d'objet, il vaut mieux éviter de rajouter partout le mot "type" qui est redondant et n'apporterait donc que du "bruit" dans l'information.</p><blockquote><p>Ces tags (<a rel="nofollow" class="external text" href="https://wiki.openstreetmap.org/w/index.php?title=Special%3ASearch&amp;search=%3Atype&amp;go=Lire">trouvés via une recherche</a> dans le wiki) pourraient donc relever de mauvaise pratique, une discussion interne à la communauté mériterait d'être menée.
</p><p><a href="/wiki/Key:recycling_type" title="Key:recycling type">Key:recycling_type</a>
</p><p><a href="/wiki/Key:leaf_type" title="Key:leaf type">Key:leaf type</a>
</p><p><a href="/wiki/Key:artwork_type" title="Key:artwork type">Key:artwork type</a>
</p>
<p><a href="/wiki/Key:site_type" title="Key:site type">Key:site_type</a><br /></p></blockquote>
<h2><span class="mw-headline" id="Sous_ensemble_linguistique">Sous ensemble linguistique</span></h2>
<p>Dans ce wiki, on peut voir une version traduite en ajoutant le préfixe FR: devant une page, par exemple la page de la clé "shop" se trouve à l'addresse
</p><p><a href="/wiki/FR:Key:shop" title="FR:Key:shop">FR:Key:shop</a>
</p><p>Pour les tags dans OSM, certaines choses sont spécifiques à une langue ou à un pays, c'est le cas du répertoire SIRENE ou des codes NAF. On peut donc indiquer la référence SIRET d'une entreprise dans un point d'intérêt avec ce tag:
</p><p><a href="/wiki/FR:Key:ref:FR:SIRET" title="FR:Key:ref:FR:SIRET">ref:FR:SIRET</a>
</p>
<h5><span id="Exemples_de_particularit.C3.A9s_r.C3.A9gionales"></span><span class="mw-headline" id="Exemples_de_particularités_régionales">Exemples de particularités régionales</span></h5>
<p>La classification des écoles en France est différente du reste du monde, et détaillée avec une sous clé<span>&#160;</span>:FR
</p><p><code><bdi>kindergarten:FR</bdi>=<bdi>crèche_parentale</bdi></code>
</p><p><a href="/wiki/FR:Key:kindergarten:FR" title="FR:Key:kindergarten:FR">FR:Key:kindergarten:FR</a>
</p><p>à noter que le terme kinder désigne un enfant en Allemand, en Anglais le terme désigne aussi bien une crèche, qu'une école, qu'un jardin d'enfants. Référez vous toujours au wiki de temps à autre pour être certain de bien marquer les éléments. En cas de doute vous pouvez discuter avec d'autres contributrices et contributeurs via les divers canaux de communication existants, ou en créer d'autres.
</p>
<h2><span id="S.C3.A9mantique"></span><span class="mw-headline" id="Sémantique">Sémantique</span></h2>
<h3><span class="mw-headline" id="Comment_structurer_des_tags_qui_vont_ensemble">Comment structurer des tags qui vont ensemble</span></h3>
<p>Les origines et la langue maternelle des personnes proposant des tags a une influence certaine sur leur vision de la façon dont ceux ci devraient être ordonnés. Aussi, une langue agglutinante comme l'Allemand ne verra aucun problème à coller des tas de mots ensemble, quand cela semblera curieux et illisible pour un Francophone.
</p><p>Aussi pour enrichir la grammaire des tags et permettre la réutilisation d'un tag dans divers contextes, il est préférable de détailler sur plusieurs tags des qualifications que l'on mettrait instinctivement sur un seul terme. Ce qui nécessite une bonne connaissance des tags existants et l'assistance de puissants outils de vérification automatiques tels qu'<a href="/wiki/Osmose" title="Osmose">Osmose</a>.
</p>
<h3><span id="Propositions_pour_relier_la_s.C3.A9mantique"></span><span class="mw-headline" id="Propositions_pour_relier_la_sémantique">Propositions pour relier la sémantique</span></h3>
<p>Beaucoup de problèmes de sémantique sont résolus avec l'utilisation <a href="/wiki/FR:Data_items" title="FR:Data items">des data items</a>
</p><p>Unifier les <i>presets</i> entre les éditeurs de carte résoudrait des inconsistances (ID, josm, etc...)
</p>
<h2><span id=".C3.A9volution_des_tags"></span><span class="mw-headline" id="évolution_des_tags">évolution des tags</span></h2>
<h4><span id="Probl.C3.A8mes_concernant_l.27.C3.A9volution_des_tags"></span><span class="mw-headline" id="Problèmes_concernant_l'évolution_des_tags">Problèmes concernant l'évolution des tags</span></h4>
<p>De nombreux outils utilisent les tags actuellement en base avec leur nom historique, les faire changer serait un risque de rupture de compatibilité avec ces outils. Ce qui freine la standardisation et l'évolution des tags. Il convient de prévenir des mois ou des années à l'avance les éditeurs de logiciels utilisant des tags amenés à évoluer, via les actualités OSM et les listes de diffusion.
</p><p>Toute la difficulté étant dans le choix de ce qu'il convient de changer, et de mesurer la balance bénéfice - risque pour la communauté.
<br />voir: <a href="/wiki/FR:Processus_de_proposition" title="FR:Processus de proposition">le processus de proposition de nouveaux tags</a>
</p>
<h3><span id="D.C3.A9termination_de_rendu_visuel_d.27un_Tag"></span><span class="mw-headline" id="Détermination_de_rendu_visuel_d'un_Tag">Détermination de rendu visuel d'un Tag</span></h3>
<p>comment proposer un pictogramme pour un tag via la <a href="/wiki/Map_Icons/Proposed_Icons" class="mw-redirect" title="Map Icons/Proposed Icons">proposition d'icones</a>.<br />
</p>
<h2><span id=".C3.A9l.C3.A9ments_non_tranch.C3.A9s_dans_la_communaut.C3.A9"></span><span class="mw-headline" id="éléments_non_tranchés_dans_la_communauté">éléments non tranchés dans la communauté</span></h2>
<p>- une clé doit elle se rapporter à un usage d'un objet&#160;?
</p><p>-
cette page est à compléter.
</p>
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