Template:Pt:Relation
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 | This is meant seriously! About 6000 pages transclude these templates. Before proposing changes, have a look at section Design Decisions. |
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Esta predefinição pode ser usado para inserir links para relações. This page documents the features of the templates {{Area}}, {{Node}}, {{Relation}}, and {{Way}}. These templates can be used for inserting links to either nodes, ways, or relations (area links to a closed way) as well as tool links. All templates share a common codebase. Therefore, they work almost identical ({{Area}} and {{Relation}} have each a minor difference to the rest).
It was rewritten in Autumn 2018 using fewer options and Lua.
Usage
The usage is similar for all templates described here. You just have to adjust the name (e.g. {{Area|...}} instead of {{Node|...}}). Writing
{{node|12345}}
results in
12345
12345
Overview of all parameters:
| Name/Number | Possible values | Description |
|---|---|---|
| 1 | Integer | refers to an OSM ID, required parameter |
| 2 | String | label for the main link, default: same as ID |
| tools | all, josm, mini, no, or short | tool links to be displayed, default: no(ne) |
| lang | language code from Mediawiki's list or special code in this wiki | used to assure the labelling of the links in a certain language (see section Translation below) |
Feature list
| Wiki code | Result | Note |
|---|---|---|
| {{Relation|2345}} | 2345 2345 |
The icon links to the wiki article about relations. |
| {{Relation|2345|Promenade}} | Promenade Promenade |
|
| {{Relation|2345|tools= all }} | 2345 2345 (iD JOSM history analyse) |
|
| {{Relation|2345|tools= all |Promenade}} | Promenade Promenade (iD JOSM history analyse) |
|
| {{Relation|2345|tools= all |lang= vi }} | 2345 2345 (iD JOSM lịch sử phân tích) |
translation to Vietnamese |
| {{Relation|2345|Promenade|tools= all |lang= ar }} | Promenade Promenade (iD JOSM التاريخ analyse)  |
translation falls back to English as Arabic translation is incomplete. |
| {{Way|12346|tools= all |lang= ar }} | 12346 12346 (iD JOSM التاريخ) |
links displayed depending on the element |
| {{Relation|2345|tools= josm }} | 2345 2345 (JOSM) |
|
| {{Relation|2345|tools= josm |Promenade}} | Promenade Promenade (JOSM) |
|
| {{Relation|2345|tools= mini }} | 23452345 | |
| {{Relation|2345|tools= mini |Promenade}} | PromenadePromenade | |
| {{Relation|2345|tools= no }} | 2345 2345 |
|
| {{Relation|2345|tools= no |Promenade}} | Promenade Promenade |
|
| {{Relation|2345|tools= short }} | 23452345 (i J) | |
| {{Relation|2345|tools= short |Promenade}} | PromenadePromenade (i J) | |
| {{Relation||Promenade}} | Lua error in Module:Element at line 60: Given relation id parameter is not a number. | Does not work, ID required. |
Translation
If the parameter tools is set to all, the link labelled history will be shown. In case of {{Relation}} there is an additional link analyse. Their labels will align themselves to the page language. There is also a lang parameter for explicitly setting the language. Extracting the language of a page seems to be an expensive process (for the parser which takes longer to create the page). Unfortunately, this is also repeated for every occurrence of the template even on the same page. Therefore, translations are limited to a minimum (i.e. there is a translation with tools=all only).
lang parameter
The lang parameter is used to explicitly request a translated version of the template. It translates two English texts ("analyse" and "history"). These are used with the setting tools=all only. It also adds the prefix for the link to the article "relation" (below the icon) regardless of its existence. Whilst the language is automatically detected, the link will not change without request. This is due to the fact that the icon's wikicode is generated before the language version may be detected.
Languages for Translation
The module stores all translations in Module:Element/translation. There are the following priorities for examining the correct language:
- user input in lang parameter
- dedicated language namespace (DE, ES, FR, IT, JA, NL, RU)
- language title prefix (all other prefixes)
- English as default
This means that there is no specified fallback language used apart from English.
The templates {{Hu:Relation}}, {{Pl:Relation}} and {{Pt:Relation}} are versions of this template which fall back to Hungarian, Polish and Portuguese if no user input is provided.
Adding a Language
Please paste the following lines into the code of Module:Element/translation:
translateAnalyse = {
-- other language codes alphabetically before 'code'
['code'] = "your translation",
-- other language codes alphabetically after 'code'
},
translateHistory = {
-- other language codes alphabetically before 'code'
['code'] = "your translation",
-- other language codes alphabetically after 'code'
},
Missing language
If there is no complete translation, the page is also added to one of the subcategories of Category:Pages with missing translation. This is useful for finding missing translations in this wiki. The language name is read from Module:OSM Constants or mw.language.fetchLanguageName(pageLanguage, 'en').
Design Decisions
This section aims to explain why this template works this way. It should be read before proposing any changes. There may be different opinions (see Discussion page), but this documentation only focuses on the current implementation.
- Why are the tools not shown by default?
- This is simply too "expensive" (see translation). This setting would result in many pages being displayed in maintenance categories like Category:Pages where template include size is exceeded. It would also assume that everyone using this template (think of a mapper fixing a wiki error without wiki background) wants to have all tools available.
- Why are there so few tools only?
- This is a general purpose template, if you need special links, you can add them directly to your page. Please remember that the parser is not able to cache this template, so if you link to five relations, it has to create 35 (= 5 * 7) links in the worst case (i.e. displaying all tools).
- Why was the "undefined relation" option dropped?
- Simply because it fails its purpose: This template is for linking to a relation, if there is no relation (yet) you can simply leave out this template (this is commonly done now anyway). This would be like a link to a web page with an "under construction" banner only. In addition, as it displayed text, it had to compute the page language and translate the text for every call, a functionality that can be archived at lower cost by inserting the text itself.
- Why is there no "status"?
- Template:State provides a more detailed way of documenting mapping statuses.
- Why are shortened URLs used instead of the long forms?
- There are pages that include this template over 1000 times. Replacing short URLs like osm.org with openstreetmap.org would increase the size of the expanded text by 11 characters. The change would scale up to 11,000 characters in such an article. There are also options which use multiple links, this would result in an even bigger increase.
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