name: Removed.
id: Removed.
created: Set to current timestamp.
title: Removed.
contributors: Combined, with duplicates removed.
description: Combined as two paragraphs.
version: Set to 1.0.
keywords: Combined, with duplicates removed.
image: Removed.
homepage: Removed.
sources: Combined, with duplicates removed.
licenses: Combined, with duplicates removed.
bibliographicCitation: Removed.
project$id: Removed.
project$title: Combined.
project$acronym: Removed.
project$description: Combined as two paragraphs.
project$path: Removed.
project$samplingDesign: Sampling design of x.
project$captureMethod: Combined, with duplicates removed.
project$individuals: TRUE if one of the datasets has TRUE.
project$observationLevel: Combined, with duplicates removed.
coordinatePrecision: Set to the least precise coordinatePrecision.
spatial: Reset based on the new deployments.
temporal: Reset based on the new deployments.
taxonomic: Combined, with duplicates removed.
relatedIdentifiers: Combined, with duplicates removed.
references: Combined, with duplicates removed.
Custom properties of x are also retained.