How can I add color AND a node label to a scatter plot?

I'd like to produce a scatter plot from a data file. The data file could look like this:

 x       y       color   myvalue
0.5     0.2     1       test
0.2     0.1     2       uniform


I'd like to add the string data in column myvalue to the nodes, but still have the option to colour the marks. I tried two things recommended in the manual:

\begin{tikzpicture}
\begin{axis}[% scatter/use mapped color={draw=black,fill=mapped color},
enlargelimits=0.2]
scatter src=explicit symbolic,
nodes near coords,]
table [x=x, y=y, meta=myvalue] {tab.tbl};

\end{axis}
\end{tikzpicture}


This allows me to put the labels to the marker in the plot.

But I don't know how to add colours. My second attempt was to use the colour for the point meta data (manual page 88), but then I couldn't add text (it would only accept numbers in the code below):

\begin{tikzpicture}
\begin{axis}[enlargelimits=0.2]
scatter src=explicit symbolic,
% we use ’point meta’ as color data...
point meta=\thisrow{color},
% ... therefore, we can’t use it as argument for nodes near coords ..
nodes near coords*={\myvalue},
% ... which requires to define a visualization dependency:
visualization depends on={\thisrow{myvalue} \as \myvalue},
]
table [x=x, y=y, meta=myvalue] {tab.tbl};
\end{axis}
\end{tikzpicture}


How can I have both?

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oh, I found the solution in a related question.

The key is to use value in front of the macro definition.

The working code is:

\begin{tikzpicture}
\begin{axis}[% scatter/use mapped color={draw=black,fill=mapped color},
enlargelimits=0.2]
% we use ’point meta’ as color data...
point meta=\thisrow{color},
% ... therefore, we can’t use it as argument for nodes near coords
nodes near coords*={\myvalue},
% ... which requires to define a visualization dependency:
visualization depends on={value \thisrow{myvalue} \as \myvalue},
]
table [x=x, y=y]
{tab.tbl};
\end{axis}


\end{tikzpicture}

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