Re: [h5md-user] graphical notation

[Felix Höfling]

Am 30.08.2011, 08:38 Uhr, schrieb Pierre de Buyl  
<address@hidden>:

> Le 29 août 11 à 03:44, Felix Höfling a écrit :
> > Hi,
> >
> > Our tree diagrams should have different notations for groups, datasets,  
> > and attributes to make the structure more transparent. If we want to  
> > use UTF-8, it could look like this:
> >
> > trajectory
> >      \-- group1
> >           \-- position
> >           |    \→ sample
> >           |    |    \… minimum
> >           |    |    \… maximum
> >           |    \→ step
> >           |    \→ time
> Looking into "more usual", I can think of keeping the present notation  
> for groups and datasets. Altough it does not make a distinction between  
> the two, it has never posed a problem to me.
OK, a dataset can be identified as a leaf of the tree (once the attributes  
are distinguished).

> Regarding attributes, I agree that they should be denoted in a different  
> way.
> I propose
>      trajectory
>       \-- group1
>            \-- position
>            |    \-- sample
>            |    |    +-- minimum
>            |    |    +-- maximum
>            |    \-- step
>            |    \-- time
> Or
>      trajectory
>       \-- group1
>            \-- position
>            |    \-- sample
>            |    |    --- minimum
>            |    |    --- maximum
>            |    \-- step
>            |    \-- time
> that is, using "+--" or "---" for the attributes.
I prefer "+--", it provides still some connection to the line above. An  
alternative I was thinking about was to put the attributes at the same  
line as the dataset:

      trajectory
       \-- group1
            \-- position
            |    \-- sample --> minimum, maximum
            |    \-- step
            |    \-- time

Shall optional attributes be enclosed in brackets? E.g.,

      trajectory
       \-- group1
            \-- position
            |    \-- sample
            |    |    +-- [minimum]
            |    |    +-- [maximum]
            |    \-- step
            |    \-- time

Felix