Read GeoNetwork service metadata (one row per service)

This function reads a GeoNetwork XML search response (as delivered by https://gdi.berlin.de/geonetwork/srv/ger/q?...) and converts it into a tidy tibble with one row per metadata record. All <link> elements of a record are kept together in a list column called links, where each entry is itself a tibble created by parse_gn_link().

Usage

read_metadata(path_xml)

Arguments

path_xml: Path or URL to the GeoNetwork XML document. This can be a local file (e.g. "geoportal_metadaten.xml") or a remote URL such as "https://gdi.berlin.de/geonetwork/srv/ger/q?...".

Value

A tibble with one row per metadata record and the columns:

geonet_uuid: UUID from <geonet:info><uuid> (character).
geonet_id: Internal GeoNetwork id from <geonet:info><id> (character).
title: Dataset/service title.
abstract: Dataset/service abstract/description.
serviceType: Service type, if present (e.g. WMS).
types: Semicolon-separated <type> elements.
source_logo: Logo path, if present.
links: List column; each element is a tibble with the parsed links.

Details

This structure is convenient when you want to keep the dataset-level information (title, abstract, uuid, ...) together, but still be able to inspect or unnest all service/download/view links later on.

The function assumes a GeoNetwork-style XML with <metadata> elements and the namespace geonet: available for the info block. It is tailored to the GDI Berlin instance but should work for other similar GeoNetwork responses that use the same link encoding (| separated).

If a record has no <link> elements, the links column will contain a single-row tibble with all NA values. This preserves the 1:1 alignment between records and rows.

Examples

if (FALSE) { # \dontrun{
df <- read_geonetwork_services(
  "https://gdi.berlin.de/geonetwork/srv/ger/q?facet.q=type/service&resultType=details&sortBy=changeDate&from=1&to=100&fast=index"
)
dplyr::glimpse(df)
df$links[[1]]
} # }