SI Units Si

Warning (2): Undefined array key "sr" [APP/Controller/SiController.php, line 235]

                        $duid=$this->Si->find('list',['fields'=>['name','id'],'conditions'=>['type'=>'unitsymbol','name'=>$u]]);
                        if(!stristr($u,'~')) {
                            $uid=$this->Sirel->find('list',['fields'=>['subject','object'],'conditions'=>['subject'=>$duid[$u],'predicate'=>'isUnitSymbolOf']]);

SiController::definition() - APP/Controller/SiController.php, line 235
ReflectionMethod::invokeArgs() - [internal], line ??
Controller::invokeAction() - CORE/Cake/Controller/Controller.php, line 499
Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 193
Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167
[main] - APP/webroot/index.php, line 108

Warning (2): Undefined array key "sr" [APP/Controller/SiController.php, line 236]

Code Context

                        if(!stristr($u,'~')) {
                            $uid=$this->Sirel->find('list',['fields'=>['subject','object'],'conditions'=>['subject'=>$duid[$u],'predicate'=>'isUnitSymbolOf']]);
                            $eq=$this->Si->find('first',['conditions'=>['id'=>$uid[$duid[$u]]]]);

SiController::definition() - APP/Controller/SiController.php, line 236
ReflectionMethod::invokeArgs() - [internal], line ??
Controller::invokeAction() - CORE/Cake/Controller/Controller.php, line 499
Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 193
Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167
[main] - APP/webroot/index.php, line 108

Warning (2): Undefined array key "" [APP/Controller/SiController.php, line 236]

Code Context

                        if(!stristr($u,'~')) {
                            $uid=$this->Sirel->find('list',['fields'=>['subject','object'],'conditions'=>['subject'=>$duid[$u],'predicate'=>'isUnitSymbolOf']]);
                            $eq=$this->Si->find('first',['conditions'=>['id'=>$uid[$duid[$u]]]]);

SiController::definition() - APP/Controller/SiController.php, line 236
ReflectionMethod::invokeArgs() - [internal], line ??
Controller::invokeAction() - CORE/Cake/Controller/Controller.php, line 499
Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 193
Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167
[main] - APP/webroot/index.php, line 108

DERIVEDUNIT: lumen

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PID: si:derivedunit:lumen
Definition: The lumen is the derived unit for luminous flux.
Source: SI Brochure 9th Ed. 2019, p 138
Status: Valid
Note: In photometry the name steradian and the symbol sr are usually retained in expressions for units.
Related Definitions
- hasDerivedUnitSymbol -> lm
- hasDerivedUnitInBaseSI -> cd sr
- hasDerivedUnitInOtherSI -> cd sr