= !MapGuide RFC 158 - Simplified JSON responses and GeoJSON support = This page contains a change request (RFC) for the !MapGuide Open Source project. More !MapGuide RFCs can be found on the [wiki:MapGuideRfcs RFCs] page. == Status == ||RFC Template Version||(1.0)|| ||Submission Date||12 Apr 2017|| ||Last Modified||12 Apr 2017|| ||Author||Jackie Ng|| ||RFC Status||draft|| ||Implementation Status||In Progress|| ||Proposed Milestone||3.3|| ||Assigned PSC guide(s)||(when determined)|| ||'''Voting History'''||(vote date)|| ||+1|||| ||+0|||| ||-0|||| ||-1|||| ||no vote|| || == Overview == This RFC proposes to simplify all JSON responses from the mapagent == Motivation == All JSON responses from the mapagent are verbatim conversions from their XML counterparts. However this conversion process results in JSON that is quite cumbersome to consume: * All properties are arrays. * All properties are string values. This is due to the conversion process not taking the content model (and its data types/element cardinality) into account, taking the lowest common denominator approach. == Proposed Solution == The MgJsonConvert class that does the actual XML to JSON conversion will be modified to include a hard-coded list of XML element paths: * For elements that contain 0 to many elements * For elements that are not string data types During the conversion process, we check the computed XML element path of the element we're converting and check if it is in one of these two lists * If it is in the first list, the element is written as a JSON array * If it is in the second list, the element will not have its value quoted To retain compatibility with clients using the JSON responses of the older mapagent, using simplified JSON responses is opt-in, by including {{{CLEAN=1}}} as part of your mapagent request parameters. When this is specified, the old XML to JSON conversion behaviour will be used. With the new JSON responses, not only are they more simpler to use (not everything is an array and not everything is a string and the content structure is semantically similar to their XML counterparts), but is also much more compact due to the amount of {{{[}}} and {{{"}}} characters we save by not converting everything to string arrays Fusion will also be updated to take advantage of the new clean JSON responses. == GeoJSON output == For the {{{SELECTFEATURES}}} mapagent operation, even with the clean JSON response formatting applied, the JSON response is still near-useless for consumption by client applications. For this particular operation, if we want the response in JSON, since it includes spatial data for features it is more practical to return this in GeoJSON format, which is more ubiquitous and more practical for client-application consumption. To enable this, we'll be adding a new MgGeoJsonWriter utility class to the PlatformBase library to enable easy GeoJSON conversion from feature readers {{{ ///////////////////////////////////////////////////////////////////////////////////////////////////////// /// \brief /// A helper class to output GeoJSON from feature readers /// class MG_PLATFORMBASE_API MgGeoJsonWriter : public MgGuardDisposable { PUBLISHED_API: ////////////////////////////////////////////////////////////////// /// \brief /// Constructs a MgGeoJsonWriter object /// /// /// \htmlinclude DotNetSyntaxTop.html /// MgGeoJsonWriter(); /// \htmlinclude SyntaxBottom.html /// \htmlinclude JavaSyntaxTop.html /// MgGeoJsonWriter(); /// \htmlinclude SyntaxBottom.html /// \htmlinclude PHPSyntaxTop.html /// MgGeoJsonWriter(); /// \htmlinclude SyntaxBottom.html /// MgGeoJsonWriter(); ////////////////////////////////////////////////////////////////// /// \brief /// Converts the current feature in the given feature reader to GeoJSON /// /// \remarks /// The id and geometry properties are inferred from the class definition returned by the feature reader /// /// /// \htmlinclude DotNetSyntaxTop.html /// string FeatureToGeoJson(MgFeatureReader featureReader, MgTransform transform); /// \htmlinclude SyntaxBottom.html /// \htmlinclude JavaSyntaxTop.html /// String FeatureToGeoJson(MgFeatureReader featureReader, MgTransform transform); /// \htmlinclude SyntaxBottom.html /// \htmlinclude PHPSyntaxTop.html /// string FeatureToGeoJson(MgFeatureReader featureReader, MgTransform transform); /// \htmlinclude SyntaxBottom.html /// /// \param featureReader (MgFeatureReader) /// The feature reader /// /// \param transform (MgTransform) /// An optional transform /// /// \return /// Returns the GeoJSON output as a string. /// STRING FeatureToGeoJson(MgFeatureReader* featureReader, MgTransform* transform); ////////////////////////////////////////////////////////////////// /// \brief /// Converts the current feature in the given feature reader to GeoJSON /// /// /// \htmlinclude DotNetSyntaxTop.html /// string FeatureToGeoJson(MgFeatureReader featureReader, MgTransform transform, string idPropertyName, string geomPropName); /// \htmlinclude SyntaxBottom.html /// \htmlinclude JavaSyntaxTop.html /// String FeatureToGeoJson(MgFeatureReader featureReader, MgTransform transform, String idPropertyName, String geomPropName); /// \htmlinclude SyntaxBottom.html /// \htmlinclude PHPSyntaxTop.html /// string FeatureToGeoJson(MgFeatureReader featureReader, MgTransform transform, string idPropertyName, string geomPropName); /// \htmlinclude SyntaxBottom.html /// /// \param featureReader (MgFeatureReader) /// The feature reader /// /// \param transform (MgTransform) /// An optional transform /// /// \param idPropertyName (String/string) /// The name of the id property. The value of the property specified will be written to the top-level "id" property of the GeoJSON /// /// \param geomPropName (String/string) /// The name of the geometry property. The value of the property specified will be written to the top-level "geometry" property /// of the GeoJSON. If this property is not specified, no geometry is written. /// /// \return /// Returns the GeoJSON output as a string. /// STRING FeatureToGeoJson(MgReader* reader, MgTransform* transform, CREFSTRING idPropertyName, CREFSTRING geomPropName); }; }}} The {{{SELECTFEATURES}}} operation with {{{CLEAN=1}}} will use this class to output the response as GeoJSON. This class is also available to the public API for MapGuide applications to use. == Class Definition and Feature Schema responses == The current XML responses for {{{GETCLASSDEFINITION}}} and {{{DESCRIBESCHEMA}}} return verbose FDO schema XML that requires manual XML parsing from client applications to extract any meaningful information out of them. It is not a naturally decipherable description of a FDO class definition or feature schema. The automatically converted JSON form is even more difficult to extract and parse. As part of the simplification theme of this RFC, these 2 operations will support a new {{{SIMPLE}}} flag that if set to {{{1}}} will cause the operation to return a simplified XML response. These simplified XML responses conform to the new {{{FeatureSchemaCollection-3.3.0.xsd}}} and {{{ClassDefinition-3.3.0.xsd}}} schemas (see attached files) Sample XML/JSON responses for Sheboygan Parcels schema looks like this: XML (Simple) {{{ SHP_Schema Parcels false false SHPGEOM SHPGEOM The geometry of the object 102 false WGS84 Lat/Long's, Degre 4 3 6 11 13 false false Autogenerated_SDF_ID Autogenerated identity property 100 7 0 true true true 0 0 URL 100 9 0 true false false 0 0 NAME 100 9 0 true false false 0 0 ID 100 9 0 true false false 0 0 RSTATE 100 9 0 true false false 0 0 RYEAR 100 7 0 true false false 0 0 GEOEXTRA 100 7 0 true false false 0 0 RBLDGVC 100 7 0 true false false 0 0 RLDESCR1 100 9 0 true false false 0 0 RLANDVC 100 7 0 true false false 0 0 RTYPE 100 9 0 true false false 0 0 DETACHED_G 100 9 0 true false false 0 0 RACRE 100 9 0 true false false 0 0 RLOT 100 9 0 true false false 0 0 RNAME 100 9 0 true false false 0 0 RLDESCR2 100 9 0 true false false 0 0 NO_UNITS 100 7 0 true false false 0 0 LAST_SALE 100 5 0 true false false 0 0 YRBUILT 100 7 0 true false false 0 0 RES_BED 100 7 0 true false false 0 0 RES_FULL_B 100 7 0 true false false 0 0 RPROPAD 100 9 0 true false false 0 0 RES_HALF_B 100 7 0 true false false 0 0 KEYRLSEQ 100 9 0 true false false 0 0 RLDESCR3 100 9 0 true false false 0 0 ATTACHED_G 100 9 0 true false false 0 0 RCITY 100 9 0 true false false 0 0 RBILAD 100 9 0 true false false 0 0 SQFT 100 7 0 true false false 0 0 RSQFT 100 7 0 true false false 0 0 RZIP 100 7 0 true false false 0 0 RLDESCR4 100 9 0 true false false 0 0 RSECLN 100 9 0 true false false 0 0 GEOMAIN 100 7 0 true false false 0 0 RES_TTL_RO 100 9 0 true false false 0 0 RPROCD 100 9 0 true false false 0 0 RWARD 100 7 0 true false false 0 0 }}} JSON (Simple, Clean) {{{ { "FeatureSchemaCollection": { "@xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance", "@xsi:noNamespaceSchemaLocation": "FeatureSchemaCollection-3.3.0.xsd", "FeatureSchema": [ { "Classes": { "ClassDefinition": [ { "DefaultGeometryPropertyName": "SHPGEOM", "Description": null, "IsAbstract": false, "IsComputed": false, "Name": "Parcels", "Properties": { "Property": [ { "Description": "The geometry of the object", "GeometryTypes": 4, "HasElevation": false, "HasMeasure": false, "IsIdentity": false, "Name": "SHPGEOM", "PropertyType": 102, "ReadOnly": false, "SpatialContextAssociation": "WGS84 Lat/Long's, Degre", "SpecificGeometryTypes": { "Type": [ 3, 6, 11, 13 ] } }, { "DataType": 7, "DefaultValue": null, "Description": "Autogenerated identity property", "IsAutoGenerated": true, "IsIdentity": true, "Length": 0, "Name": "Autogenerated_SDF_ID", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": true, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "URL", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "NAME", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "ID", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RSTATE", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RYEAR", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "GEOEXTRA", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RBLDGVC", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RLDESCR1", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RLANDVC", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RTYPE", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "DETACHED_G", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RACRE", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RLOT", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RNAME", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RLDESCR2", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "NO_UNITS", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 5, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "LAST_SALE", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "YRBUILT", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RES_BED", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RES_FULL_B", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RPROPAD", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RES_HALF_B", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "KEYRLSEQ", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RLDESCR3", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "ATTACHED_G", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RCITY", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RBILAD", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "SQFT", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RSQFT", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RZIP", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RLDESCR4", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RSECLN", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "GEOMAIN", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RES_TTL_RO", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RPROCD", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RWARD", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 } ] } } ] }, "Description": null, "Name": "SHP_Schema" } ] } } }}} Sample XML/JSON responses for Sheboygan Parcels class definition looks like this: XML (Simple) {{{ Parcels false false SHPGEOM Autogenerated_SDF_ID Autogenerated identity property 100 true 7 0 true true true 0 0 URL 100 false 9 0 true false false 0 0 NAME 100 false 9 0 true false false 0 0 ID 100 false 9 0 true false false 0 0 RSTATE 100 false 9 0 true false false 0 0 RYEAR 100 false 7 0 true false false 0 0 GEOEXTRA 100 false 7 0 true false false 0 0 RBLDGVC 100 false 7 0 true false false 0 0 RLDESCR1 100 false 9 0 true false false 0 0 RLANDVC 100 false 7 0 true false false 0 0 RTYPE 100 false 9 0 true false false 0 0 DETACHED_G 100 false 9 0 true false false 0 0 RACRE 100 false 9 0 true false false 0 0 RLOT 100 false 9 0 true false false 0 0 RNAME 100 false 9 0 true false false 0 0 RLDESCR2 100 false 9 0 true false false 0 0 NO_UNITS 100 false 7 0 true false false 0 0 LAST_SALE 100 false 5 0 true false false 0 0 YRBUILT 100 false 7 0 true false false 0 0 RES_BED 100 false 7 0 true false false 0 0 RES_FULL_B 100 false 7 0 true false false 0 0 RPROPAD 100 false 9 0 true false false 0 0 RES_HALF_B 100 false 7 0 true false false 0 0 KEYRLSEQ 100 false 9 0 true false false 0 0 RLDESCR3 100 false 9 0 true false false 0 0 ATTACHED_G 100 false 9 0 true false false 0 0 RCITY 100 false 9 0 true false false 0 0 RBILAD 100 false 9 0 true false false 0 0 SQFT 100 false 7 0 true false false 0 0 RSQFT 100 false 7 0 true false false 0 0 RZIP 100 false 7 0 true false false 0 0 RLDESCR4 100 false 9 0 true false false 0 0 RSECLN 100 false 9 0 true false false 0 0 GEOMAIN 100 false 7 0 true false false 0 0 RES_TTL_RO 100 false 9 0 true false false 0 0 RPROCD 100 false 9 0 true false false 0 0 RWARD 100 false 7 0 true false false 0 0 SHPGEOM The geometry of the object 102 false false WGS84 Lat/Long's, Degre 4 3 6 11 13 false false }}} JSON (Simple, Clean) {{{ { "ClassDefinition": { "@xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance", "@xsi:noNamespaceSchemaLocation": "ClassDefinition-3.3.0.xsd", "DefaultGeometryPropertyName": "SHPGEOM", "Description": null, "IsAbstract": false, "IsComputed": false, "Name": "Parcels", "Properties": { "Property": [ { "DataType": 7, "DefaultValue": null, "Description": "Autogenerated identity property", "IsAutoGenerated": true, "IsIdentity": true, "Length": 0, "Name": "Autogenerated_SDF_ID", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": true, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "URL", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "NAME", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "ID", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RSTATE", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RYEAR", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "GEOEXTRA", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RBLDGVC", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RLDESCR1", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RLANDVC", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RTYPE", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "DETACHED_G", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RACRE", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RLOT", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RNAME", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RLDESCR2", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "NO_UNITS", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 5, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "LAST_SALE", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "YRBUILT", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RES_BED", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RES_FULL_B", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RPROPAD", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RES_HALF_B", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "KEYRLSEQ", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RLDESCR3", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "ATTACHED_G", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RCITY", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RBILAD", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "SQFT", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RSQFT", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RZIP", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RLDESCR4", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RSECLN", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "GEOMAIN", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RES_TTL_RO", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 9, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RPROCD", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "DataType": 7, "DefaultValue": null, "Description": null, "IsAutoGenerated": false, "IsIdentity": false, "Length": 0, "Name": "RWARD", "Nullable": true, "Precision": 0, "PropertyType": 100, "ReadOnly": false, "Scale": 0 }, { "Description": "The geometry of the object", "GeometryTypes": 4, "HasElevation": false, "HasMeasure": false, "IsIdentity": false, "Name": "SHPGEOM", "PropertyType": 102, "ReadOnly": false, "SpatialContextAssociation": "WGS84 Lat/Long's, Degre", "SpecificGeometryTypes": { "Type": [ 3, 6, 11, 13 ] } } ] } } } }}} == Operation Versioning == All affected mapagent operations that provide a JSON representation will have a new {{{3.3.0}}} operation version where the new {{{CLEAN}}} flag is supported in addition to all the parameters supported by their most recent version of their respective operation. This flag will be ignored on older operation versions. The {{{SIMPLE}}} flag will also be supported on version {{{3.3.0}}} of {{{GETCLASSDEFINITION}}} and {{{DESCRIBESCHEMA}}} in addition to all the parameters supported by their most recent version of their respective operation. Like the {{{CLEAN}}} flag, the {{{SIMPLE}}} flag will be ignored on older versions of these operations. == Implications == Any time a new schema or schema revision is introduced, this hard-coded list will have to be updated to know which elements in these new schemas require special processing. == Test Plan == Test all applicable mapagent operations with {{{CLEAN=1}}} to verify clean JSON output. == Funding / Resources == Community