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01_​Data_​API_​Using_​REST_​Nodes

World Health Organisation - Data API using the new REST nodes

The World Health Organisation (WHO) provides a wide range of data on health related topics. Here we show how to access data from their RESTful webservice, which provides information on causes of death. The data are retrieved as XML, and the relevant data are extracted using the XPath nodes.
After some processing and aggregation statistics a subset of the data is plotted using a Tag cloud to show differences in the top 10 causes of death for men and women.
We also plot a Bar Chart showing how death rates have changed between 2000 and 2012.

We also show to do combine multiple calls to a webservice using the GET Request node. Once again, the XML data are processed using the XPath nodes, and the leading causes of death are subsequently plotted in a bar chart. This chart highlights the differences between the various regions of the world.

This workflow access the data via a RESTful webservice, manipulated and plotted using a Tag Cloud.It also shows an example of how to combine data from multiple GET requests. Query and combine data from multiple URLs Send GET request to the REST service Visualization Get WHO data oncause of death for'High Income' countriesConvert from XMLto table formLook at 2012 data onlyPlot high-income country top 10 causes of deathQuery multiple URLsat onceTake the list ofURLs and do each queryConvert from XMLto table formPlot cause of deathper regionfor 2000 and 2012Generate Tag Cloud(Blue: Male, Pink: Female)Apply differentcolours to diseasesthat affect men and women differentlyFilter out'All Causes'Filter out'communicable' and'non-communicable'disease superclassesPivot and Tag GET Request XPath Row Filter Bar Chart Table Creator GET Request XPath Bar Chart Tag Cloud Color Manager Row Filter Row Filter Prepare forTag Cloud Data Processing Data Processing This workflow access the data via a RESTful webservice, manipulated and plotted using a Tag Cloud.It also shows an example of how to combine data from multiple GET requests. Query and combine data from multiple URLs Send GET request to the REST service Visualization Get WHO data oncause of death for'High Income' countriesConvert from XMLto table formLook at 2012 data onlyPlot high-income country top 10 causes of deathQuery multiple URLsat onceTake the list ofURLs and do each queryConvert from XMLto table formPlot cause of deathper regionfor 2000 and 2012Generate Tag Cloud(Blue: Male, Pink: Female)Apply differentcolours to diseasesthat affect men and women differentlyFilter out'All Causes'Filter out'communicable' and'non-communicable'disease superclassesPivot and TagGET Request XPath Row Filter Bar Chart Table Creator GET Request XPath Bar Chart Tag Cloud Color Manager Row Filter Row Filter Prepare forTag Cloud Data Processing Data Processing

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Created by: jon
Created at: 2016-07-06
On NodePit since: 2025-03-14
Last update: 2025-04-20
Created with KNIME version: v4.1.1
Tags: RESTGET RequestPathTag CloudWHOURLcombinemultiple

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