SAPUI5 - using select with odata - sapui5

Question

I am trying to fill select items from odata service. I used the odata service in a list just to test it and it works, no problems. But when i set the data to Select i get "invalid XML" error.
Here is my xml view :
<mvc:View controllerName="packdialogue.controller.s1" xmlns:html="http://www.w3.org/1999/xhtml" xmlns:mvc="sap.ui.core.mvc" displayBlock="true"
xmlns="sap.m"
xmlns:l="sap.ui.layout">
<App id="s1">
<pages>
<Page title="{i18n>title}" id="s1page" >
<content>
<FlexBox
alignContent="Center"
justifyContent="Center"
width="auto"
>
<Panel
class="s1Panel"
backgroundDesign="Solid" >
<l:VerticalLayout>
<Text
textAlign="Center"
id="S1LgnumLabel"
visible="true"
text="{i18n>S1LgnumLabel}"
width="18em">
</Text>
<Input
class="s1Input"
id="S1LgnumInput"
enabled="true"
width="18em">
</Input>
<Button
id="S1EnterButton"
text="{i18n>S1Button1Text}"
width="21.5em"
press="onEnterPressed"
>
</Button>
<Text
textAlign="Center"
id="S1WSLabel"
visible="false"
text="{i18n>S1WSLabel}"
width="18em">
</Text>
<Button
id="S1NextButton"
press="onS1ButtonPressed"
text="{i18n>S1Button2Text}"
width="21.5em"
enabled="false"
visible="false"
>
</Button>
<Select
items="{test>/WorkcenterSet}">
<items>
<core:Item key="{test>wrkst}" text="{test>wrkst}" />
</items>
</Select>
<List
id="S1List"
visible="false"
items="{test>/WorkcenterSet}"
>
<StandardListItem
title="{test>wrkst}"
iconDensityAware="false"
iconInset="false" />
</List>
</l:VerticalLayout>
</Panel>
</FlexBox>
</content>
</Page>
</pages>
</App>
When i delete the Select from my View I get no errors so the problem is in the select, but I can't figure out what is wrong with my code.

Answer 1

You forgot to add core namespace into the view header:
xmlns:core="sap.ui.core"
So, when it comes to it does not know what to do.

Answer 2

I believe you should define core namespace in the XML for <core:Item key="{test>wrkst}" text="{test>wrkst}" />
<mvc:View controllerName="packdialogue.controller.s1"
xmlns:html="http://www.w3.org/1999/xhtml" xmlns:mvc="sap.ui.core.mvc"
displayBlock="true"
xmlns="sap.m"
xmlns:core="sap.ui.core"
xmlns:l="sap.ui.layout">