The following changes have been made to ArcXML 1.1 since the release of ArcIMS 9.0.

New attributes in SP1:

• GCSTYLE
• endoffset
• sideoffset
• sideoffsetunits

New elements and attributes in SP2:

• FROMCOORDSYS
• id
• string
• datumtransformid
• datumtransformstring
• GET_PROJECT
• accuracy
• compact
• densifytolerance
• envelope
• PROJECT
• TOCOORDSYS
• id
• string
• datumtransformid
• datumtransformstring

New attributes values in SP2:

• GET_IMAGE
• show has a new value "strict"

Changes in the response in SP2

In a SERVICEINFO response, both id and string may be present in the response for FEATURECOORDSYS and FILTERCOORDSYS.

• For ArcMap Image Services, both id and string are returned unless the projection string has been customized. In this case, only string is returned.
• For Image and Feature Services, if id is present, then only id is returned in the response. If string is present, both string and id are returned unless the projection string has been cutomized. In this case, only string is returned.

Other items of note

The following notes and restrictions have been added to the documentation or been updated to help reduce any ambiguity on the given topic. 

• When referencing a field name in a database, performance is generally better if the field name is referenced in all upper case. Elements affected by this are CHARTSYMBOL,CHARTVALUE, DATASET, PARTITION, QUERY, SIMPLELABELRENDERER, SPATIALQUERY, TRUETYPEMARKERSYMBOL, VALUEMAPLABELRENDERER, and VALUEMAPRENDERER.
• Several elements give you two choices for formatting geometry. The more compact format is to use the element COORDS. Although the geometry requires less bandwidth by the request or response, performance may be better when the non-compact format is used even though the requests and responses are longer. This is especially true when geometry is written to an acetate layer. Elements affected by this are GET_FEATURES and GET_PROJECT.