The Web Annotations Compliant Annotation Store is a software to host Web Annotations. Since most of the digital editions we are working on highlight some annotations, e.g. entites together with additional information or URLs to authority files, we decided to utilize the W3C-specification for Web Annotations as they define a flexible and interoperable format.
Given a TEI source document with some additional markup, like personal entites, we transform the text to HTML representing the semantic markup by simply placing html elements with an identifier. This identifer then is used to target the annotation by naming it in an CSS selector.
This allows to provide multi-layered annotations and a possible client can define what layer to show with what visualization technique.
WAPCAS is where all the annotations end up. Created at some point during the data transformation workflow the annotations are sent to the store waiting for clients to retrieve the data.