[Photon] photon search suggestions

[Holger Bruch (mfdz)]

Hi Wolfgang,
> Questions:
> 
> Is suburb information somehow included in the downloaded search index?
> If yes, how can it be displayed?
> How is this downloadable search index built? Also based on Nominatim?
Yes, the downloadable index is built via Nominatim. It currently does not include suburb information. The pending PR #303 reads suburb information from Nominatim.
> Further question:
> 
> Is there a solution for the following problem:
> "Lukasstr Miltenberg" is not found if you type "lukas str miltenberg"
> "Landsberger Straße München" is not found if you type "landsbergerstr münchen"
> =>  You have to type it exactly as in database (with or without space)
This issue is equivalent to #42 which is still open. PR #312 (WIP) addresses this using a custom ES hyphenation plugin, which on indexing and search splits the search term e.g. before str. 

Best regards,
Holger
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