According to http://www.typo3-probleme.de/2018/07/11/typo3-sitemap-mit-typoscript-erstellen-2285/ I let TYPO3 V8.7.24 generate the sitemap.xml file. So far it works. But in the file there are not proper URL's. On every URLs end is "?type=500001", for example an URL looks like "https://www.domain.ch/angebot/online-marketing/?type=500001". As a side note , there is also Ext:Realurl in use.
My request is, how can you remove the segment "?type=500001" ? Is the reason typoscript or the extension Realurl? How can I analyse it?
Any hint is welcome. Thanks in advance for your help.
It's the link generation inside of TYPO3. that is configured by typoscript, so you could see typoscript as the culprit.
If you want to know whether realurl (or any other extension) is the culprit: disable the extension in mind. if the error is gone there is a reason to suspect this extension.
When links are generated by TYPO3 it holds some parameter to stay in the current context. Which paramaters should be considered is a configuration (so it is grounded in typoscript).
Have a look (TSOB) at config.linkVars in general (it is copied implicit to every page object) or of your page object page.config.linkVars (in your case: xml_sitemap.config.linkVars)
There is a note in the manual:
Do not include the type parameter in the linkVars list, as this can result in unexpected behavior.
Other option would be to explicit set &type=0 to every link. But don't forget to set config.uniqueLinkVars = 1 (or xml_sitemap.config.uniqueLinkVars = 1)