Usage of v:or for multiple else-style conditions

Or.html

<div xmlns:v="http://typo3.org/ns/FluidTYPO3/Vhs/ViewHelpers"
     xmlns:f="http://typo3.org/ns/fluid/ViewHelpers">

<!-- v:or can be used for long chains of conditions where the first
     not-empty value gets used -->

<!-- If {person} for example can have three different email addresses'
     but you only wish to display one of them: -->

Email: {person.workEmail -> v:or(alternative: person.secretaryEmail) -> v:or(alternative: person.homeEmail)}

<!-- Which displays one of the three email addresses with priority
     to the workplace email, secondary priority to a secretary's
     email and if neither is defined, person's home email -->
     
<!-- Can also be used as a chain after any other condition to use
     the "alternative" value if neither condition case outputs content -->
     
{f:if(condition: person.workEmail, then: person.workEmail, else: person.secretaryEmail) -> v:or(alternative: person.homeEmail)}

<!-- Which is exactly the same as the above example with two v:or tags
     but as you can see, takes less space and is easier to read -->
     
<!-- Can also be used to deliver default images when no image exists: -->

<f:image src="{myObject.imageFile -> v:or(alternative: settings.defaultImageFile)}" alt="" />

<!-- All in all, a more compact alternative to multiple f:if tags which
     is ideally used as inline syntax in chains. -->

</div>