This placeholder brings together our analysis of the keywords that annotate our candidate catalogues. The keywords provide a high level perspective on the contents of the catalogues and nonetheless indicate a fertile ground for analysis and comparison. We are predominantly interested to investigate the possibility of keyword co-occurrences in the four catalogues. Co-occurring keywords institute a common factor that can easily be exploited to cluster and compare our catalogues.

The html tabs in the navigation bar contain snapshots of the most frequently used keywords (tags) for each individual catalogue. Two snapshots are taken for each catalogue using wordle.net; one using the raw keywords (omitting any text processing from our end), and another after a series of text operations has been applied. More details in the respective tabs.

	Total keywords per catalogue Using RAW keywords No text-processing Interactive chart Click on slices for details
	Total distinct keywords per catalogue Duplicates removed Using RAW keywords No text-processing Interactive chart Click on slices for details

...