API.MetadataFields.md

Metadata Fields

In addition to user-defined fields, infotons have fields that are created automatically by CM-Well. The following table summarizes these fields and their types:

Metadata Type	Infoton Type	Metadata Fields
system	All infotons	parent - the immediate parent infoton of the given infoton parent.parent_hierarchy - the entire "ancestor" hierarchy of the given infoton, in ascending order of hierarchy lastModified - the time the infoton was last modified path - the infoton's path in CM-Well uuid - the infoton's unique ID quad - all labels of the named graphs with which the infoton has an associated statement dataCenter - the data center where the original version of the infoton was first written indexTime - the time the infoton was indexed current - whether the infoton is the current version or a historic version
content	File infotons	data - the file's textual data length - the data size in bytes mimeType - the file's Mime type
link	Link infotons	to - the target infoton linked to kind - kind of link (0=Permanent, 1=Temporary, 2=Forward)

Here is an example of an infoton with its system fields:

{
  "type" : "ObjectInfoton",
  "system" : {
	"uuid" : "64aba0e57e2670953024d59f3ecf275a",
	"lastModified" : "2015-03-08T11:11:06.712Z",
	"path" : "/permid.org/1-21525576839",
	"dataCenter" : "dc1",
	"indexTime" : 1425813066712,
	"parent" : "/permid.org"
  },
  "fields" : {
	"IsTradingIn.mdaas" : [ "EUR" ],
	"QuoteExchangeCode.mdaas" : [ "FRA" ],
	"CommonName.mdaas" : [ "UBS NCB PUT 14P" ],
	"IsQuoteOf.mdaas" : [ "http://permid.org/1-21525557620" ],
	"type.rdf" : [ "http://ont.thomsonreuters.com/mdaas/Quote" ],
	"TRCSAssetClass.mdaas" : [ "Traditional Warrants" ],
	"RCSAssetClass.mdaas" : [ "TRAD" ],
	"ExchangeTicker.mdaas" : [ "UA44FB" ],
	"RIC.mdaas" : [ "DEUA44FB.F^L14" ]
  }
}

Using the qp operator, you can perform search queries in metadata fields as well as in user-defined fields. For example, the following query searches for file infotons whose text body contains the string "configuration":

<cm-well-host>/meta?qp=content.data:configuration