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• 13 May, 2024
• By Dave Cassel
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An important element in software development is understanding what's happening as your application runs. The user interface should provide responses...

• 6 May, 2024
• By Dave Cassel
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How do you know when your database has something new that would interest your users? How do you categorize incoming...

• 27 April, 2024
• By Dave Cassel
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Progress MarkLogic is an enterprise, multi-model, NoSQL database, search engine, and application server. It's able to cover a lot of...

• 22 April, 2024
• By Dave Cassel
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In one of my recent posts, I talked about ExecuteScriptMarkLogic, a handy processor for getting Apache NiFi to talk to...

• 10 April, 2024
• By Dave Cassel
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For years, I've used Apache NiFi as a data orchestration tool. Based on NiFi's built-in scheduler, we pull data from...

• 28 June, 2023
• By Dave Cassel
• No Comments

A little-used Progress MarkLogic feature (from what I’ve seen) is the ability to change a document’s quality. Lowering this value...

• 28 March, 2023
• By Dave Cassel
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We can use the marklogic-unit-test framework to test custom APIs hosted in Progress MarkLogic. Doing so is more of an integration test...

• 28 November, 2022
• By Dave Cassel
• No Comments

We recently came across a neat little gotcha that I thought was worth sharing. I’ve written before about how JSON...

• 28 October, 2022
• By Dave Cassel
• No Comments

MarkLogic’s temporal feature allows an out-of-the-box way to preserve copies of a document when it gets updated. You can read...

• 28 August, 2022
• By Dave Cassel
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The responsibilities of a DBA are different for MarkLogic than for a traditional relational database. While the line of responsibility...

• 28 July, 2022
• By Dave Cassel
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MarkLogic offers several types of indexes: Universal, range, triples. These indexes provide fast access to your content and can be...

• 28 July, 2022
• By Dave Cassel
• No Comments

Every now and then I write an Optic query that has parts that look redundant. In the example below, assume...

• 28 July, 2022
• By Dave Cassel
• No Comments

With MarkLogic’s SPARQL queries, we can bind a value to constrain the query. Using this capability, we can gather information...

• 28 July, 2022
• By Dave Cassel
• No Comments

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....

• 28 November, 2021
• By Dave Cassel
• No Comments

MarkLogic’s Data Hub Central offers an easy way to create entities. As a bonus, it automatically creates a TDE Template...

• 28 November, 2021
• By Dave Cassel
• No Comments

As we move data from other sources (often relational databases) into MarkLogic JSON, we have the opportunity to change the...

• 28 October, 2021
• By Dave Cassel
• No Comments

I just learned something the hard way, so I thought I’d share. The tl;dr is that sem.sparqlUpdate runs in a separate transaction by default,...

• 28 May, 2021
• By Dave Cassel
• No Comments

I’ve seen a couple cases recently where we were making modifications to a document in MarkLogic and the process was...

• 21 May, 2021
• By Dave Cassel
• No Comments

We’re used to doing reviews for source code. NiFi flows look different, but when they are part of your application’s...

• 28 April, 2021
• By Dave Cassel
• No Comments

The NiFi EvaluateJsonPath processor lets you specify a JSON path, which will be applied to the content of a flow...

• 28 February, 2021
• By Dave Cassel
• No Comments

If you have made or are considering an investment in MarkLogic, you’ve got an opportunity or problem you weren’t able...

• 20 February, 2021
• By Dave Cassel
• No Comments

5 o’clock is 5 o’clock, right? Well, not once we start thinking about time zones. 17:00:00-05:00 (5pm here on the...

• 28 January, 2021
• By Dave Cassel
• No Comments

We can load data into a data hub from a variety of upstream data sources. What if we want to...

• 6 October, 2020
• By Dave Cassel
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MarkLogic supports XQuery and JavaScript as native languages. XQuery is a very natural way to work with XML, just as...

• 28 September, 2020
• By Dave Cassel
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MarkLogic is both a database and a search engine. Sometimes, you know you only want one result from your search....

• 28 February, 2020
• By Dave Cassel
• No Comments

In NiFi, FlowFiles are pieces of data that a processor needs to work on. In this case, NiFi is calling...