I disagree. You could encode field name in the binary. Then at de-
serialization, you can read the field descriptor and reconstruct the
field. There is absolutely no need for tags. They are indeed
cumbersome.

On Oct 22, 6:02 pm, Henner Zeller <henner.zel...@googlemail.com>
wrote:
> On Fri, Oct 22, 2010 at 15:01, Paul <mjpabl...@gmail.com> wrote:
> > Hi,
>
> > This may seem like a basic question, but I find having to label
> > the .proto file with unique tag numbers for each field a little
> > cumbersome, especially if there are a lot of fields.
>
> > message Person {
> >  required string name = 1;
> >  required int32 id = 2;
> >  optional string email = 3;
> > }
>
> > Can I define a .proto file without the tag numbers, like so?
>
> > message Person {
> >  required string name;
> >  required int32 id;
> >  optional string email;
> > }
>
> No.
>
> The reason for this explicit definition is that the protocol buffer is
> 'future compatible': fields written with a particular tag will always
> be written with that tag. Consider you want to re-structure the fields
> in your proto buffer to say (Id, name, email) ... then they would get
> a different 'automatic' tag assigned and you wouldn't be able to read
> files written with older binaries. If the tags are assigned, then
> re-arranging fields in the file does not matter.
>
> -h
>
>
>
>
>
> > Thanks,
> > Paul
>
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