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With MarkLogic’s SPARQL queries, we can bind a value to constrain the query. Using this capability, we can gather information about something of interest. But what if I want to query against multiple values? Let’s start with some sample data. ‘use strict’; declareUpdate(); const sem = require(“/MarkLogic/semantics”) const myPred = sem.iri(“myPredicate”); sem.rdfInsert([1, 2, 3, 4, […]

In my last post, I talked about using the bindings parameter of MarkLogic’s sem.sparql function to look for multiple values in a SPARQL query. It turns out that approach doesn’t work for SPARQL Update. I’ll use the same sample data as my previous post: ‘use strict’; declareUpdate(); const sem = require(“/MarkLogic/semantics”) const myPred = sem.iri(“myPredicate”); sem.rdfInsert([1, 2, 3, 4, […]

MarkLogic’s Data Hub Central offers an easy way to create entities. As a bonus, it automatically creates a TDE Template for you, making your entity accessible through SQL or Optic API queries. However, we ran into an error with this process recently. After creating an entity and processing some sample data, a member of the […]

As we move data from other sources (often relational databases) into MarkLogic JSON, we have the opportunity to change the way data are represented. I’ve seen a pattern a few times where the incoming source repeats a field, appending a number. I’ll illustrate with a simplified example: name,pet_name_1,pet_name2 David,Merry,Pippin Alice,Spot, Bob,Fluffy,George When I see something […]