On Monday, May 12, 2014 1:23:12 AM UTC-7, Michael Hunger wrote:
>
> if you are a bit familiar with Java you can also use the batch-inserter
> API yourself to implement the things you need.
>
> This also applies to other JVM languages too, like JRuby, Jython, ...
I realize this, but I'd much rather use your solution than hack up my own
(:-).
> > I'd like to express these as node properties, but the Batch Importer
> > uses TSV syntax, which has a fixed set of properties per node.
> Yep, good insight, you don't want to store those value triples as
> relationships.
>
The YAGO distribution is divided into 25 "themes" (eg, Facts,
Labels, MetaFacts). I could easily imagine wanting to filter results based
on the theme. Adding a "theme" property to a relation is easy, but I'm not
sure how to encode the theme for properties.
So far, the best solution I have is to create a property ("yago:hasISBN")
and a meta-property ("yago:hasISBN:theme"). Am I missing a better approach?
> Yes, it skips empty cells
>
Cool. There are ~50 possible properties, but I assume that's OK...
> > Given that the nodes file no longer has ID numbers, how do I
> > tell the Batch Importer which entities to modify?
>
> If it would work You could state the properties to look-up from an index
> and then use those to find and update the nodes. But the index read
> performance is much slower than the batch-inserter write performance.
>
> Usually what I'd do is to programmatically read all nodes of the graph and
> store the relevant lookup property (eg. url) and the node-id in a Map or
> sorted array. Then you can find the node quickly by id and update it.
>
Yes, but that would get me back into writing code. Fortunately, it looks
like I can do the entire import in a single run, based one (HUGE)
specification file.
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