[mapserver-users] mapserver creating layers group MS , that is displayed in GetCapabilities. how to get rid of it? what is the reason for it?

[Rahkonen Jukka (MML)]

WMS service does not actually need to have a root layer but usually it exists. Each layer must have a title but name in optional. If layer does not hava a name it cannot be accessed with GetMap so what you need to do is to get rid of the name of your root layer. How to do that is documented in https://www.mapserver.org/ogc/wms_server.html:

Map Name and wms_title:
WMS Capabilities requires a Name and a Title tag for every layer. The Map’s NAME and wms_title metadata will be used to set the root layer’s name and title in the GetCapabilities XML output. The root layer in the WMS context corresponds to the whole mapfile. You can suppress the root layer’s name by setting wms_rootlayer_name to "".

There has been some changes in configuring the name of the root layer. Earlier it just took the NAME from the MAP level if it was not left empty. Do you perhaps have “MS” as a name of your mapfile now?

Discussion about the topic in https://github.com/mapserver/mapserver/issues/5404

And this is from the WMS 1.3.0 standard:

7.2.4.6.2 Title
A <Title> is mandatory for all layers; it is a human-readable string for presentation in a menu. The Title is not
inherited by child Layers.
7.2.4.6.3 Name
If, and only if, a layer has a <Name>, then it is a map layer that can be requested by using that Name in the
LAYERS parameter of a GetMap request. A Layer that contains a <Name> element is referred to as a “named
layer” in this International Standard. If the layer has a Title but no Name, then that layer is only a category title for
all the layers nested within. A server that advertises a Layer containing a Name element shall be able to accept
that Name as the value of LAYERS argument in a GetMap request and return the corresponding map. A client
shall not attempt to request a layer that has a Title but no Name.
A server shall throw a service exception (code="LayerNotDefined") if an invalid layer is requested.
A containing category itself may include a Name by which a map portraying all of the nested layers can be
requested at once. For example, a parent layer "Roads" may have children “Interstates” and “State Highways”
and allow the user to request either child individually or both together.
The Name is not inherited by child Layers.


-Jukka Rahkonen-


Lähettäjä: mapserver-users <mapserver-users-bounces at lists.osgeo.org> Puolesta Zmitser Kozhukh
Lähetetty: torstai 16. huhtikuuta 2020 17.32
Vastaanottaja: mapserver-users at lists.osgeo.org
Aihe: [mapserver-users] mapserver creating layers group MS , that is displayed in GetCapabilities. how to get rid of it? what is the reason for it?

Good day,
I haven’t been using mapserver for a while, but I guess, that since last time I have used it, something has changed.
Now when I am querying GetCapabilities of WMS service, created by Mapserver (version 7.2.0 running on a linux server), it puts everying in ‘MS’ layer group. But I don’t have any MS group defined in mapfile. Could anyone explain how to get rid of this MS group in GetCapabilities xml? This is how it looks in xml:
<Layer queryable="1">
<Name>MS</Name>
<Title>MS</Title>
<Abstract>MS</Abstract>
<CRS>EPSG:4326</CRS>
….
after normal layers follow:
        <Layer queryable="1" opaque="0" cascaded="0">
        …..
        </Layer>
        …..
</Layer>
So for me it looks that for no reason the group MS is created which is sort of container for all normal layers.
But how to get rid of this MS group?
Sincerely,


--
Zmitser Kozhukh
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