FGDC_CSDGM- The stand-alone metadata XML file has content stored in the FGDC CSDGM XML format.The document's format will be checked, and the correct conversion will be performed to transform its content to the ArcGIS metadata XML format. DEFAULT- Use this option if you are importing metadata from a stand-alone metadata XML file and you are unsure what XML format it uses.CUSTOM- A custom XSLT stylesheet will be used to convert from another XML format to the ArcGIS metadata XML format.The options provided with this method allow you to remove unwanted content from an item's metadata and reduce the overall size of a metadata document as much as possible. To optimize performance, you may want to delete the geoprocessing history from the metadata of every item in the database. When all the items in an enterprise geodatabase contain metadata documents of this size, performance of the database as a whole is affected. Metadata documents containing years of geoprocessing history have been known to be 2 GB in size. When geoprocessing history is recorded in an item's metadata, and geoprocessing tools are constantly used to analyze, evaluate, and manage data as with utility networks and parcel datasets, over time the geoprocessing history can grow to be very large in size. ![]() Files containing important information should be stored independently and referenced by the item's metadata. This practice will further increase the size of an item's metadata document and can affect database performance. Enclosing files in an item's metadata is not recommended. With ArcCatalog, it was possible to base64 encode files up to 5 MB in size and store them within an item's metadata in the same manner that files can be attached to an email this can't be accomplished using ArcGIS Pro. Depending on how the thumbnail is created, documents with full metadata and a thumbnail typically average 250 KB in size. Thumbnails are recommended to help describe the item and support using the item and its metadata throughout ArcGIS software including ArcGIS Online. Documents typically range from 10 to 100 KB in size. Metadata documents are not typically very large even when they include robust text describing the item that is fully compliant with a geospatial metadata standard. However, you can use this option to remove all thumbnails from an item's metadata. Thumbnails are helpful when searching for maps or data, and when publishing content to ArcGIS Online or an Enterprise portal.
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