There are two schema files available to download that are both needed to consume the API.
There are a couple of generic types used by many resources. They use the namespace
https://opendata.smhi.se/xsd/portal.xsd and are not subject to the API versioning system.
linkType and linksType
linkType represents a link to another resource. It consist of:
rel- the mediatype of the target resource ( application/xml )
type- the xsd type of the target resource ( parameter )
href- the url to the target resource ( https://opendata-download-hydroobs.smhi.se/api )
linksType represents a set of
linkType with additional information.
This information contains a
title to describe the resource, a
summary for extra description and
updated which represents the last time the target resource, or underlying subresources, was
This can be useful to deside if data is stale or not without traversing down to the actual data.
linksType is used to represent the next level.
For instance the Category type uses a list of
linksType to represent all the Versions available.
linkType in this case refers to the different Versions in different formats.
Besides links to the same resource or the next resource in different formats,
linkType are also used to refer to other useful resources. Here are some examples.
- Parent resources
linkTypeis available in the Versions listing of all the Parameters and also in the Parameter and Data resource itself.
geoBox and geoLinksType
geoBox represents an area of interest devided by
geoLinksType is a regular
linksType but with an additional
category and version
version types are used for versioning. The
version element in
category links to the different versions of the API that can be used. Versions are incremented when
changes are made to the API. There is one special version called
latest. This version is virtual and always points to the latest version of the API. It is not recomended to use this in any application as it might
be redirected without notice. Instead try to use the version with the highest number as these do not change. Older versions will be deprecated and only maintained for a couple of months.
version type contains links to all available
The rest of the types are versioned and uses the namespace
https://opendata.smhi.se/xsd/hydroobs_v1.xsd. Common to these main types are
key- resource identifier
title- the name of the resource
summary- description of the resource
linkto other resources such as to themself in other mediatypes and more specific links to the next level.
hydroObsParameter represents a parameter. It contains
LinksType to all stations that produces data for the specific parameter.
hydroObsStation represents a station. It contains
LinksType to all the available periods for the specific parameter and station.
hydroObsStationSet is a grouping of several stations.
to or list of
hydroObsPosition can be given.
hydroObsPeriod is the final level before the actual data.
hydroObsPosition represents position and intervals for the station. This might seem strange but is needed as some stations has moved over time.
hydroObsStationSetDataType and hydroObsStationSetData
hydroObsStationSetDataType is the base type for two different kinds of data.
It contains information about the Parameter and the Period.
Notice the lack of information about Station since these are only used for Station Set.
Instead the Station information is bundled with the values list.
This is the same information that can be found on levels leading up to the data, but can be convenient when using data urls without traversing the structure.