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It provides "extraneous" language functions independent of MediaWiki that ate required by Semantic MediaWiki and its registration system.
## JSON format
The location of the content files is determined by the [`$smwgExtraneousLanguageFileDir`](https://www.semantic-mediawiki.org/wiki/Help:$smwgExtraneousLanguageFileDir) setting.
### Field definitions
- `fallback_language`defines a fallback language tag
- `datatype`
- `labels` datatype labels
- `aliases` datatype aliases
- `property`
- `labels` predefined property labels
- `aliases` predefined property aliases
- `namespace`
- `labels` namespace names
- `aliases` namespace aliases
- `date`
- `format` to a define a rule set of how to resolve preferred date formats for dates with 1, 2, and 3 components. It is defined as an array where the constants define the order of the interpretation.
- `SMW_MDY` Month-Day-Year
- `SMW_DMY` Day-Month-Year
- `SMW_YMD` Year-Month-Day
- `SMW_YDM` Year-Day-Month
- `SMW_MY` Month-Year
- `SMW_YM` Year-Month
- `SMW_Y` Year
- `SMW_YEAR` an entered digit can be a year
- `SMW_DAY` an entered digit can be a day
- `SMW_MONTH` an entered digit can be a month
- `SMW_DAY_MONTH_YEAR` an entered digit can be a day, month or year
- `SMW_DAY_YEAR` an entered digit can be either a day or a year
- `precision` used to define the rules of formatting for a specific precision:
- `SMW_PREC_Y` Year
- `SMW_PREC_YMD` Year, Month, and Day
- `SMW_PREC_YMDT` Year, Month, Day, and Time
- `SMW_PREC_YMDTZ` Year, Month, Day, Time and Timezone
- `months` twelve strings naming the months and short strings briefly naming the month
- `days` follows ISO-8601 numeric representation, starting with Monday together with the corresponding short name
- `@...` fields leading with `@` are identified as comment fields
### Example
<pre>
{
"fallback_language": false,
"datatype": {
"labels":{
"_wpg": "Page"
},
"aliases":{
"Page": "_wpg"
}
},
"property": {
"labels":{
"_TYPE": "Has type"
},
"aliases": {
"Has type": "_TYPE"
}
},
"namespaces": {
"labels":{
"SMW_NS_PROPERTY": "Property"
},
"aliases": {
"Property": "SMW_NS_PROPERTY"
}
},
"date":{
"precision": {
"SMW_PREC_YMDTZ": "H:i:s T, j F Y"
},
"format": [
[
"SMW_Y"
]
],
"months": [
[
"January",
"Jan"
]
]
"days":[
[
"Monday",
"Mon"
]
]
}
}
</pre>
## Technical notes
<pre>
SMW\Lang
├─ Lang # interface to the language functions
├─ JsonContentsFileReader # access the contents of a `JSON` file
└─ FallbackFinder # resolving a fallback language
</pre>
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