kgs_results_aggregator

Knowledge Graphs results aggregator

Description

It is a javascript class created to merge and standardize the results coming from lodcloud-querier and datahub-querier.

You can perform a brutal search and a search by tag ang multiple tag.

You can also choose to rank the results in 4 different ways:

• name (default)
• size
• authority
• centrality

Basic Usage

Install with npm: npm install kgs_results_aggregator

// First of all you have to require the package in the code
var kgs_aggregator = require('kgs_results_aggregator');

// ..then you have to initialize the aggregator
var aggregator = new kgs_aggregator();

Now you are ready to exploit all the functions:

BRUTAL SEARCH

var results = aggregator.brutalSearch('keyword', 'rankingMode'); 
//rankingMode(optional) is one of['name', 'size', 'authority', 'centrality']

MULTITAG SEARCH

var results = aggregator.multiTagSearch('keyword', 'tag_1', 'tag_2', 'tag_3', ...,  rankingMode);
// you perform the query on several tags.

Available methods for a kgs_results_aggregator instance

• brutalSearch(target) : For each dataset in DataHub and LodCloud, it searches within all tags for the regular expression containing the target.
• multiTagSearch(target, ...tags): For each dataset, it searches within the specified tags the regular expression containing the target.
• filterResults(result, ...tags): It's a filter to return in the resulting JSON only tags specified.
• generalSorting(result, mode): It's a dispatcher method to execute the ranking algorithm specified in mode parameter.
• sortResultsBySize(results): Sorts results by triples number.
• sortResultsByName(results): Sorts results in alphabetic order using the name.
• sortResultsByAuthority(results): Sorts results by authority using the pagerank algorithm.
• sortResultsByCentrality(results): Sorts results by centrality using the centrality algorithm.