Skip to content

# `` smushing

A FOAF smushing example.

Filter a graph by normalizing all `foaf:Persons` into URIs based on their `mbox_sha1sum`.

Suppose I get two FOAF documents each talking about the same person (according to `mbox_sha1sum`) but they each used a `BNode` for the subject. For this demo I’ve combined those two documents into one file:

This filters a graph by changing every subject with a `foaf:mbox_sha1sum` into a new subject whose URI is based on the `sha1sum`. This new graph might be easier to do some operations on.

An advantage of this approach over other methods for collapsing BNodes is that I can incrementally process new FOAF documents as they come in without having to access my ever-growing archive. Even if another `65b983bb397fb71849da910996741752ace8369b` document comes in next year, I would still give it the same stable subject URI that merges with my existing data.

Attributes:

- `EXAMPLES_DIR` –
- `STABLE` –
- `g` –
- `newURI` –
- `o` –
- `out` –
- `s` –

## `` EXAMPLES_DIR `module-attribute`

    EXAMPLES_DIR = parent

## `` STABLE `module-attribute`

    STABLE = Namespace('http://example.com/person/mbox_sha1sum/')

## `` g `module-attribute`

    g = Graph()

## `` newURI `module-attribute`

    newURI = {}

## `` o `module-attribute`

    o = get(o, o)

## `` out `module-attribute`

    out = Graph()

## `` s `module-attribute`

    s = get(s, s)