unmatched terms: keywords exsisting in the metadata but not in the knowledge graph

[Aricha9801]

There are many keywords from the metadata failed to find a match, because those keywords are not yet in the knowledge graph. Doesn't mean that all those keywords should be included to the knowledge graph or the concept set (candidate concepts for matching), because many keywords are:

• Broad terms: (e.g., agriculture, natural sciences,...)
• Irrelevant terms: (e.g., zero hunger, article, monthly, ...)
• Places (e.g., Africa, China, ...)

But it still depends on users which kind of terms are desired in the filtering.

The whole list of the missed keywords (latest: 12-12-2024) can be found here missed_terms.txt. The list is very long (>16,000 terms), not that realist to let users check it in details.

Except these terms, some keywords that seems relevant are: (may not be all relevant, I am poor in soil science)

soil carbon: 115
soil types: 457
phosphorus: 164
carbon sequestration: 133?
methane: 108
evapotranspiration: 70
soil moisture: 69
ph: 60
calcium: 54
salinity: 49
nitrates: 48
ammonia: 42
nitrification: 41
rhizosphere: 41
mycorrhizae: 39
microplastics: 34
soil chemistry: 32
soil water: 32

Need to find out how to handle those missing terms.

@wbcbugfree Just for your reference. For now we just leave it like this I think, and we can see if the future evolution of the knowledge graph will include these terms.