Hi,

for a many2one field, just use ref like :

<field name="property_account_expense_categ" ref="account_lapagept.stock_en_transit" />

corresponding number to use for type field at end of this page :

 
https://doc.odoo.com/6.0/developer/2_5_Objects_Fields_Methods/methods/

For a many2many field, a list of tuples is expected. Here is the list of tuple that are accepted, with the corresponding semantics

(0, 0, { values }) link to a new record that needs to be created with the given values dictionary

(1, ID, { values }) update the linked record with id = ID (write *values* on it)

(2, ID) remove and delete the linked record with id = ID (calls unlink on ID, that will delete the object completely, and the link to it as well)

(3, ID) cut the link to the linked record with id = ID (delete the relationship between the two objects but does not delete the target object itself)

(4, ID) link to existing record with id = ID (adds a relationship)

(5) unlink all (like using (3,ID) for all linked records)

(6, 0, [IDs]) replace the list of linked IDs (like using (5) then (4,ID) for each ID in the list of IDs)

Example:

[(6, 0, [8, 5, 6, 4])] sets the many2many to ids [8, 5, 6, 4]

For a one2many field, a lits of tuples is expected. Here is the list of tuple that are accepted, with the corresponding semantics

(0, 0, { values }) link to a new record that needs to be created with the given values dictionary

(1, ID, { values }) update the linked record with id = ID (write *values* on it)

(2, ID) remove and delete the linked record with id = ID (calls unlink on ID, that will delete the object completely, and the link to it as well)

Example:

[(0, 0, {'field_name':field_value_record1, ...}), (0, 0, {'field_name':field_value_record2, ...})]

For a many2one field, simply use the ID of target record, which must already exist, or False to remove the link.

For a reference field, use a string with the model name, a comma, and the target object id (example: 'product.product, 5')

bye