885b6512_Spatial_Join__Analysis___Datatype
[Parameter] Join Features (Required) [Explanation] The dataset that you are joining from. The attributes from this dataset are appended to the attributes of the target feature class in the output based on a spatial relation. It can be any spatial data source (shapefiles, SDE feature classes, coverages, SDC, query tables etc) supported by ArcGIS. It can also be read only. [Datatype] 
Feature Layer
F e a t u r e L a y e r
F e a t u r e C l a s s
S t r i n g
B o o l e a n
F i e l d M a p p i n g s
L i n e a r u n i t
Spatial Join (Analysis)