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filter is not described

wxr_export_skip_postmeta filter-hook . WP 3.3.0

Filters whether to selectively skip post meta used for WXR exports.

Returning a truthy value to the filter will skip the current meta object from being exported.

Usage

add_filter( 'wxr_export_skip_postmeta', 'filter_function_name_6429', 10, 3 );
function filter_function_name_6429( $skip, $meta_key, $meta ){
	// filter...

	return $skip;
}
$skip(true/false)
Whether to skip the current post meta.
Default: false
$meta_key(string)
Current meta key.
$meta(object)
Current meta object.

Where the hook is called

export_wp()
wp-admin/includes/export.php 563
if ( apply_filters( 'wxr_export_skip_postmeta', false, $meta->meta_key, $meta ) )

Where the hook is used (in WP core)

wp-admin/includes/export.php 404
add_filter( 'wxr_export_skip_postmeta', 'wxr_filter_postmeta', 10, 2 );