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| = Network versioning using relationnodes | |
| Recently there was a nice blog on versioning networks by Ian Robinson (http://iansrobinson.com/2014/05/13/time-based-versioned-graphs/[read it here]) on using identity nodes and separating structure from state. In this gist I'd like to put in my 2 cents by introducing another approach using _relationnodes_. This is more about structure of a network than about states of nodes, but it treats versioning differently. As Ian states in his blog, there's always a trade-off to be made, since versioning causes an extra load on storage and processing. | |
| == Relationnodes? | |
| === What are relationnodes? | |
| Relation nodes are intermediary nodes between two network nodes that represents the relation between the nodes. | |
| So, if A and B are two network nodes, instead of connecting them with a relationship of `[:RELTYPE]`, |
This experiment takes two taxa for the same lizard (Geckonia chazaliae or Tarentola chazaliae) and runs a query to discover that these taxa are duplicates. In other words, GBIF has the same lizard twice in its classification.
Geckonia chazaliae (name) ion:614045
Geckonia chazaliae (taxon) gbif:2445625
Tarentola chazaliae (name) ion:1748852
Tarentola chazaliae (taxon) gbif:5843252
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| <title>Edit point location (with georeferencing)</title> | |
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| En dan nu: het ecologisch weerbericht ‘Wisselvallig. De voedselwebben in | |
| het midden en oosten van het land vertonen matige tot krachtige | |
| verstoring. Biodiversiteits- indices liggen onder het gemiddelde voor | |
| deze tijd van het jaar. De populatie-afnames van waterinsecten zijn | |
| matig, fase III, langs de kust en rond het IJsselmeer soms krachtig, | |
| fase IV of V. En in het Groene Hart is er een pollinatie-alarm van | |
| kracht’. Toekomstmuziek, natuurlijk. Maar met een beetje fantasie is | |
| zo’n ‘ecologisch weerbericht’ over enkele decennia misschien geen | |
| science fiction meer. Al éénderde eeuw registreert EIS-Nederland de | |
| verspreiding en het voorkomen van de Nederlandse insecten en andere |
| { | |
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| "handle": "10.1186/1475-2875-12-415", | |
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| { | |
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| "data": "http://www.malariajournal.com/content/12/1/415", | |
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| "timestamp": "2013-11-16T20:02:17Z" |
| graph | |
| [directed 1 | |
| node [ id 8672 label "Pinnotheridae" ] | |
| node [ id 4645088 label "Alain" ] | |
| node [ id 5971711 label "Alain crosnieri" ] | |
| node [ id 5971712 label "Alain raymondi" ] | |
| node [ id 4382392 label "Alainotheres" ] | |
| node [ id 4382393 label "Alainotheres leloeuffi" ] | |
| node [ id 4645085 label "Arcotheres" ] | |
| node [ id 5971485 label "Arcotheres latifrons" ] |