2.8.3. Hunt for keywords

here is the backbone of our query defined in the previous step:
project AND electrolysis AND hydrogen AND europe

Let’s now go hunting for keywords. We should add there any “signs” that point towards the object.

• Synonyms
• Translation
• sub-objects
• …
  

Construction site: factory, gigafactory, “to construct”, mw, ??mw, gw,… (here we guess that the production capability would be described in mw in articles)
Electrolysis: electrolysis, electrolyte, electrolyzis, electrolyzer,…
Hydrogen: h2, hydrogen, hydrogène,…
Europe: France, french, german, germany… (here europe can also mean its entities it contains, the demonyms, maybe towns & regions,… )

Now replace the objects by the list of keywords:
(h2 OR hydrogen) AND (electrolysis OR electrolyser OR electrolysers OR electrolyzers OR electrolyte) AND (france OR french OR german OR germany OR belgium OR belgian)

All the objects have their search terms linked with OR’s and within ( ).