Flickr is an excellent playground for learning XML web services. Among other reasons, Flickr offers clear documentation, an instructive API Explorer that lets you try the API through a browser, and lots of prior art to study in terms of remixes and mashups. Hundreds of third-party apps are using the Flickr API.
CITATION STYLE
Learning Web Services APIs Through Flickr. (2008). In Pro Web 2.0 Mashups (pp. 121–170). Apress. https://doi.org/10.1007/978-1-4302-0286-8_6
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