For a long time the only means to insert records into a Meresco index was by harvesting them from an OAI repository. Over time a need arised to be able to insert records from non OAI sources. This has been accomplished by making use of the ‘Inbox’ component.
Several Meresco implementers already had their own database without an OAI-repository interface. Moreover it turned out to be impossible to add OAI interfaces to these systems; some did just not provide the technical means necessary to construct such an interface. Most systems provide means to export their data into a file-format; being one large file or several smaller files. This gives Meresco an opportunity to index these records.
The ‘Inbox’ component monitors a directory for file activity. Every file is read and the content is inserted into the application DNA of the server. By adding format specific components as observer of the inbox component, virtually any data format can be used and indexed. For example, using the standard Meresco XSLT crosswalk mechanism, the custom XML format can be converted to e.g. OAI Dublin Core or MODS.
Recently the inbox was implemented in the TU Delft Library Discover Project as a means to update records selectively. The usage of the new search engine has uncovered several mistakes made over the years in the catalogue and these are now being corrected. After correcting the found mistakes the record is exported into the inbox and thereby automatically reindexed.