Whence the HLA (High Level API)?

I’ve had a fair number of questions about obtaining the High Level API
– aka “HLA”. Sad to say, it’s not available anymore. It was an
experiment in simplying the InDesign SDK, and developers that tried it
weren’t satsified. We are constantly looking for ways to make
developers more productive, so we may revisit this concept in the
future. But for now, it’s not available.