There are two ways of embedding an in-house series into a document.
Press F4 (or go to File > Document properties) and in the dialog box tick the checkbox Embed in-house series in document. Then (re)save the file and you can share your own in-house series with other Macrobond users.
Please note that this data (series starting with ih: ) will not automatically update, you are attaching only snapshot.
You can add in-house data which will exist only in particular document. Go to Series list > Document series > Create document series....
For more information about this see: Document series – adding external data.