Update README.md

README.md

@@ -4,19 +4,33 @@ Data needed by the Use Cases will be imported into the FAIRiCUBE HUB to form dat
 
 ## How to Get Data Added
 
+### Data
+
 Please hand in your requests for data to be made available within FAIRiCUBE HUB by simply adding an issue in this repository; this will add your request to the queue.
 
 **Make sure the description is correct and complete, otherwise iterations and misinterpretations can occur which lead to delays and extra effort.**
 
 If questions remain open (and this has turned out to be the regular case) a request clearing meeting will be held subsequently. Commonly, details can be clarified this way, or the data requestor gets asked to provide more technical details on the data. After successful data import the requestor will be contacted for verification, after which the git issue gets closed.
 
-## Metadata
+### Metadata
 
 In order to become visible to all, the new data set also needs to get its twin entry in the catalog (currently: one of  https://catalog.eoxhub.fairicube.eu and https://catalog.fairicube.eu). To this end, the catalog team needs to get contacted (best via mentioning them in the corresponding data upload issue). Note that the catalog typically will require additional descriptive metadata.
 
 [Here](encoding-examples/dominant_leaf_type-metadata.xml) is an example of a metadata record compliant with the OGC coverage standard.
 
-## Existing Data Catalogs
+## Finding data
+
+### Listing contents
+
+Services support a direct listing, however not necessarily with the convenience of the planned catalog:
+
+- rasdaman datacubes: [get list of datacubes](http://fairicube.rasdaman.com:8080/rasdaman/ows?&SERVICE=WCS&ACCEPTVERSIONS=2.0.1&REQUEST=GetCapabilities) (aka coverages) - beware: OGC-compliant XML document, search for "CoverageSummary" 
+- EOX: (tbd)
+
+### Catalogs
 
 A [list of data catalogs](../../wiki/Data-Catalogs) can be found in the Wiki. Please add data catalogs that are not on the list yet if you feel they are relevant as sources. Note, however, that this does not constintute a data request: no import action is associated with that list per se.
 
+## Limitations
+
+Time stamps have a peculiar mechanics on several datacubes which is not yet supported by rasdaman. Therefore, the time axis for now has ben modelled as an index (Cartesian) axis, meaning that temporal access (such as with the TIME parameter in WMS 1.3) is not yet possible. Full temporal support will become available still within 2023.