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-algae.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
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/algae_v1.xsd. Common to these main types are
key- resource identifier
update- timestamp of last modification time
title- the name of the resource
summary- description of the resource
They also contains
link to other resources such as to themself in other mediatypes and more specific links to the next level.
algaeYear, algaeMonth and algaeDay
algaeYear represents a year. It contains
linksType to all months that produces data for the specific year.
algaeDay represents a day. It contains
linksType to all datafiles for the specific day.
algaeMonth represents a month. It contains
linksType to all days that produces data for the specific month.
It is notable that the links to data points to zip-archives with
rel set to
type set to