Data products that are just a sampling of data very out of date should probably not be included. Data may be supplied with many caveats and still be public. Data products classified as public for this set of summaries should nominally be produced and released in a timely way. This characterization has been introduced in particular to flag that some data products are presently being held archivally to ensure their preservation but do not in fact yet have any reasonable set of materials to make the data in this form usable by anyone outside the Investigator team. Other data products have nominal format descriptions but very limited description of what's actually being measured.
Online data is clearly the base concept.
But electronically accessible data in this context may be maintained in robotic, batch-operation systems that promote or deliver data on request within hours or a day normally. Electronically-accessible data will typically be supplied at no cost to users.