ConTeXt has a list of predefined entities like & which can be used 
without the use of \xmlsetentity.

Wolfgang
> dr. Hans van der Meer <mailto:havdmeer@ziggo.nl>
> 3. April 2018 um 16:22
> Does ConText always process DOCTYPE definitions? Because in the next 
> example the defined XXX entity is substituted in one case but not in 
> the other.
>
> In a directory I have the following files:
>
> doctype.tex =
> \startxmlsetups demo:setups
> \xmlsetsetup{#1}{root}{demo:*}
> \stopxmlsetups
> \xmlregistersetup{demo}{demo:setups}
> \startxmlsetups demo:root
> \xmlflush{#1}
> \stopxmlsetups
> \startbuffer[demo]
> <?xml version="1.0" encoding="UTF-8"?>
> <!DOCTYPE Entities [<!ENTITY XXX "My xxx definition">]>
> <root>
> See &amp;XXX; for &XXX;.
> </root>
> \stopbuffer
> \starttext
> \xmlprocessbuffer{demo}{demo}{}
> \stoptext
>
> Produces as output a subtituted entity
>
>
> But
>
> doctype-public.tex =
> \startxmlsetups demo:setups
> \xmlsetsetup{#1}{root}{demo:*}
> \stopxmlsetups
> \xmlregistersetup{demo}{demo:setups}
> \startxmlsetups demo:root
> \xmlflush{#1}
> \stopxmlsetups
> \startbuffer[demo]
> <?xml version="1.0" encoding="UTF-8"?>
> <!DOCTYPE Entities PUBLIC "namen.dtd" "file://namen.dtd"><root>
> See &amp;XXX; for &XXX;.
> </root>
> \stopbuffer
> \starttext
> \xmlprocessbuffer{demo}{demo}{}
> \stoptext
>
> namen.dtd =
> <!ENTITY XXX "This is my XXX definition">
>
> The last two do not output a substituted entity. /Why is this not 
> working? What I am doing wrong?/
>
>
>
> dr. Hans van der Meer
>
>
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