Google Nature Language API

Here is a notes about the google nature language API summary I wrote  three years ago. some feature may change a bit, refer to here for latest:
Refer to here for basic concepts :



The Google Cloud Natural Language API provides natural language understanding technologies to developers, including:

  • sentiment analysis, – English
  • entity recognition, – English, Spanish, and Japanese – in fact is : nouns analysis
  • and syntax analysis – English, Spanish, and Japanese

API has three calls to do each, or can do them in one call, analyzeEntities, analyzeSentiment, annotateText.

sentiment analysis

return the value to denote the text emotion negative/positive related extent only now.
has the polarity and magnitude value as the result.

entity recognition

find out the “entity” in text – prominent named “things” such as famous individuals, landmarks, etc.
return with entities and there URL/wiki, etc.

syntactic analysis

two things returns from syntax:
1. return the sentences/subsentences of input text.
2. return the the tokens (words) and there meta in grammar syntax dependency tree.


Test Steps of commands ++++++++++++++++++++++++++++++++++

gcloud auth activate-service-account --key-file=/yourprojecytkeyfile.json

gcloud auth print-access-token

print-access-token, This will give you a token for following commands. I create three json files to test each feature:
so I can use these commands to try three API now:

curl -s -k -H "Content-Type: application/json" \
-H "Authorization: Bearer ya29.CjBWA2oWnup6dVvAlv6NTJyLsDtfqdCx70tX6_J0H7KFngd1ual2Osd8gCpcc" \ \
-d @entity-request.json

curl -s -k -H "Content-Type: application/json" \
-H "Authorization: Bearer ya29.CjBWA2op6dVv_T7nAlv6NTJyLsDtfqdCx70tX6_J0H7KFngd1ual2Osd8gCpcc" \ \
-d @syntactic-request.json

curl -s -k -H "Content-Type: application/json" \
-H "Authorization: Bearer ya29.CjBWA2oWnup6_T7nAlv6NTJyLsDtfqdCx70tX6_J0H7KFngd1ual2Osd8gCpcc" \ \
-d @3in1-request.json

About how to create these json file as input, please refer to google SDK doc.