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From Elxis Official Documentation

IOS Reservations allows you to provide extended information for the places your hotels are located to. Geographical data, sightseeing, how to get there info, are some of the information you can provide for each location. A location can be a top level parent item or a sub-location of an other location. You can have sub-locations of any level. In the picture bellow you see a screen shot of the location's edit page in IOS Reservations v3.0 administration. The screen shot is self explanatory.

You can also display pictures from Flickr for the location (make sure you have supplied required Flickr related information in IOS Reservations configuration). Just enter your desired tags (keywords) and click Check results. IOS Reservations will fetch you the images that match the search criteria. If you don't like the results or you think that they don't match the current location modify the tags and search again. This feature uses AJAX, so you can perform multiple searches without reloading the page.

Here is a sample scenario.
Let's say we are up to entering location information for the Athens centre (Greece). We need to assign this area some images for Flickr that are characteristic for this place. We can simple use the athens as the only search tag, but the search might also return us pictures for the USA's Athens city. To avoid this we add a new tag: greece. So our search tags are now: greece,athens. If we want to be even more specific (display pictures from Athen's centre and not from the suburbs) we can use the syntagma keyword (Syntagma is a central square in Athens). Greece tag is not required any more. So for tags: athens,syntagma we have the following results from Flickr.

Take a look here on how the hotel gallery will look like in IOS Reservations front-end.

If you are a developer and you are interested about Flickr API click here for more information.