The Dandelion Sentiment Analysis Curl Sample Code demonstrates how to verify the positivity, negativity, and neutrality of an opinion. Given a short sentence, it returns a label representing the identified sentiment, along with a numeric score ranging from strongly positive (1.0) to extremely negative (-1.0).
How far back do your newspaper's online archives go? The U.S. Library of Congress has a database of thousands of newspapers dating back to the 1800s. In the case of over 150 of the papers, there are also digitized, searchable pages. And it's all available via its new Chronicling America API (technical details at our Chronicling America API profile).
Saplo is a Swedish incarnation of semantic analysis. Born out of academia, the Saplo API is built on computer science and applied mathematics. This company is effectively commercializing academic research topics. What makes Saplo stand out immediately as an API provider is its list of active customers which includes two Nordic news sites. This shows that they are serious about the business behind the Saplo API and also successful at convincing experienced media players that semantic analysis is a tool that they should employ.